Production of IMR Enduron 7977 powder dates back over 200 years when the company was originally founded by E.I DuPont. Available for use in many reloading applications, the IMR series of powder is trust by reloaders all across the globe.
The slowest burn rate Enduron Technology extruded powder is IMR 7977, and is a true magnum cartridge propellant. It yields outstanding performance in such cartridges as the 300 Winchester Magnum, 7mm Remington Magnum, 338 Lapua and a host of others. Loading density is perfect for magnums, nicely filling the case at maximum charges, contributing to superb uniformity and accuracy. The 7mm Remington Magnum “never had it so good”!
IMR Enduron 7977 Smokeless Gun Powder
Important Information:
Do not exceed the loads displayed in the reloaders guide
Never mix any two powders regardless of type, brand, or source
Never substitute any smokeless powder for Black Powder or any Black Powder substitute
IMR logo
warning-icon WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov.
| Quantity | 1 Pound, 8 Pound |
|---|
97 reviews for IMR Enduron 7977 Smokeless Gun Powder
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Victor Washington (verified owner) –
jeff davis –
Thank you so much for your 5-star review! We will share this with the store team to let them know to keep up the amazing work.
Amanda Garcia (verified owner) –
“I’m very satisfied with this reloading powder. It provides excellent performance and consistency, making it an essential part of my reloading setup.”
jeff davis –
Thank you for your kind review! It’s a big encouragement to us!
Caleb Scott (verified owner) –
“One of the best powders available. It delivers a clean burn and reliable performance, making it a must-have for any serious reloader.”
jeff davis –
Thank you so much for your 5-star review! We will share this with the store team to let them know to keep up the amazing work.
Scott Powell (verified owner) –
“This powder has exceeded my expectations. It provides reliable performance and a clean burn, which has greatly enhanced my shooting accuracy.”
jeff davis –
We love your feedback! Thank you for choosing our product!
Eliana Hughes (verified owner) –
“I’m very pleased with this reloading powder. It offers reliable results and a clean burn, making it a top choice for all my reloading needs.”
jeff davis –
Your kind words just made our days! Thank you so much!
Liam Hughes (verified owner) –
“This powder is exceptional. It provides consistent results and a clean burn, which has greatly enhanced my reloading process.”
jeff davis –
Your kind words just made our days! Thank you so much!
Evelyn Butler (verified owner) –
“This reloading powder has made a significant difference in my shooting. It offers consistent performance and a clean burn, which is exactly what I needed.”
jeff davis –
We appreciate you taking the time to share your satisfaction and highest rating with us.
Paisley Mitchell (verified owner) –
“I’m very satisfied with this powder. It delivers reliable performance and consistent accuracy, making it a top choice for any reloading needs.”
jeff davis –
Thank you for your kind recognition, customer’s satisfaction is always our goal.
Amelia Butler (verified owner) –
“One of the best powders I’ve used. It delivers consistent accuracy and a clean burn, making it ideal for all reloading applications.”
jeff davis –
We’re glad you are satisfied with our item! Will do our best to keep improving it in the future.
Riley Hall (verified owner) –
“This powder is incredible. It delivers reliable performance and consistent results, making it a great addition to my reloading supplies.”
jeff davis –
Thank you for your kind review! It’s a big encouragement to us!
Sophia Garcia (verified owner) –
“Exceptional reloading powder. It offers consistent accuracy and a clean burn, making it ideal for precise and reliable shooting.”
jeff davis –
We appreciate you taking the time to share your satisfaction and highest rating with us.
Nolan Foster (verified owner) –
“I’m very satisfied with this reloading powder. It delivers consistent results and a clean burn, making it an excellent addition to my reloading supplies.”
jeff davis –
Thank you so much for taking the time to leave us a 5-star rating – it’s much appreciated!
Nicole Adams (verified owner) –
“I’m very satisfied with this powder. It delivers reliable performance and a clean burn, which has greatly improved my shooting accuracy.”
jeff davis –
Thank you so much for taking the time to leave us a 5-star rating – it’s much appreciated!
Dylan Hill (verified owner) –
“I’m very impressed with this reloading powder. It offers reliable performance and consistent results, which have greatly improved my shooting accuracy.”
jeff davis –
We love your feedback! Thank you for choosing our product!
Landon Ward (verified owner) –
“One of the best powders available. It delivers reliable performance and consistent results, making it a must-have for all types of reloading needs.”
jeff davis –
We’re glad you are satisfied with our item! Will do our best to keep improving it in the future.
Aurora Jenkins (verified owner) –
“One of the best powders available. It delivers consistent performance and a clean burn, making it a top choice for improving shooting accuracy.”
jeff davis –
Thank you so much for taking the time to leave us a 5-star rating – it’s much appreciated!
Henry Bell (verified owner) –
“I’ve found this powder to be incredibly reliable. It offers consistent results and a clean burn, which is essential for accurate shooting.”
jeff davis –
Thank you for your kind recognition, customer’s satisfaction is always our goal.
Nathan Lewis (verified owner) –
“I’m very satisfied with this reloading powder. It delivers consistent results and a clean burn, making it an excellent choice for any reloader.”
jeff davis –
Your kind words just made our days! Thank you so much!
Madelyn Gray (verified owner) –
“This powder has made a huge difference in my shooting accuracy. The clean burn and reliable performance are perfect for my reloading needs.”
jeff davis –
Your kind words just made our days! Thank you so much!
Claire Ellis (verified owner) –
“One of the best powders I’ve used. It offers consistent performance and a clean burn, making it ideal for all types of reloading.”
jeff davis –
Thank you for your kind recognition, customer’s satisfaction is always our goal.
Caleb Jenkins (verified owner) –
“This reloading powder is one of the best I’ve used. It provides reliable performance and consistent results, making it a valuable addition to my reloading setup.”
jeff davis –
We love your feedback! Thank you for choosing our product!
Sawyer Walker (verified owner) –
“One of the best powders available. It provides a clean burn and consistent results, making it ideal for all reloading needs.”
jeff davis –
Thank you for your kind review! It’s a big encouragement to us!
Logan Foster (verified owner) –
“This powder has exceeded my expectations. It provides reliable performance and consistent results, making it an excellent choice for reloading.”
jeff davis –
We love your feedback! Thank you for choosing our product!
Scarlett Garcia (verified owner) –
“Exceptional quality and performance. This powder provides consistent results and a clean burn, making it a top choice for all reloading applications.”
jeff davis –
Thank you so much for your 5-star review! We will share this with the store team to let them know to keep up the amazing work.
Savannah Scott (verified owner) –
“I’m very impressed with this reloading powder. It delivers a clean burn and consistent performance, making it a top choice for all reloading applications.”
jeff davis –
We’re glad you are satisfied with our item! Will do our best to keep improving it in the future.
Avery Clark (verified owner) –
“This reloading powder is outstanding. It delivers consistent performance and a clean burn, making it a valuable addition to any reloading supplies.”
jeff davis –
Thank you so much for your 5-star review! We will share this with the store team to let them know to keep up the amazing work.
Violet Garcia (verified owner) –
“Exceptional quality and reliability. This powder delivers consistent results and a clean burn, making it ideal for all types of reloading.”
jeff davis –
We appreciate you taking the time to share your satisfaction and highest rating with us.
Caleb Garcia (verified owner) –
“One of the best powders I’ve used. It provides consistent accuracy and a clean burn, which has greatly improved my shooting performance.”
jeff davis –
Your kind words just made our days! Thank you so much!
Mason Perry (verified owner) –
“I’m thrilled with this powder. It offers excellent consistency and reliability, enhancing my reloading process significantly.”
jeff davis –
Thank you for your kind recognition, customer’s satisfaction is always our goal.
Julian Jenkins (verified owner) –
“Fantastic quality and performance. This powder provides a clean burn and consistent results, making it a top choice for all reloading needs.”
jeff davis –
We love your feedback! Thank you for choosing our product!
Alexander Walker (verified owner) –
“Exceptional performance from this reloading powder. It provides consistent results and a clean burn, making it a valuable addition to any reloader’s bench.”
jeff davis –
Thank you for your kind review! It’s a big encouragement to us!
James Walker (verified owner) –
“I’m very pleased with the performance of this powder. It delivers consistent results and a clean burn, making it a valuable addition to my reloading supplies.”
jeff davis –
Thank you so much for taking the time to leave us a 5-star rating – it’s much appreciated!
Gabriella Scott (verified owner) –
“One of the best powders I’ve used. It offers a clean burn and consistent results, making it ideal for all types of reloading needs.”
jeff davis –
Thank you for your kind recognition, customer’s satisfaction is always our goal.
Benjamin Rogers (verified owner) –
“This reloading powder is exceptional. It provides reliable performance and a clean burn, making it a valuable addition to any reloading setup.”
jeff davis –
Thank you so much for your 5-star review! We will share this with the store team to let them know to keep up the amazing work.
Sean Roberts (verified owner) –
“This powder is fantastic. It provides reliable performance and a clean burn, which has significantly improved my reloading process.”
jeff davis –
Thank you for your kind review! It’s a big encouragement to us!
Savannah Jenkins (verified owner) –
“Fantastic quality and performance. This powder provides consistent accuracy and a clean burn, making it a top choice for all types of reloading.”
jeff davis –
We love your feedback! Thank you for choosing our product!
Christian Cooper (verified owner) –
“This powder is outstanding. It delivers a clean burn and consistent accuracy, making my reloading process much more efficient and effective.”
jeff davis –
Your kind words just made our days! Thank you so much!
Violet Perry (verified owner) –
“I’m extremely happy with this reloading powder. It provides excellent accuracy and a clean burn, making it a must-have for any reloader.”
jeff davis –
We appreciate you taking the time to share your satisfaction and highest rating with us.
Samantha Hernandez (verified owner) –
“This powder has made a noticeable improvement in my reloading process. It offers reliable performance and a clean burn, which has significantly enhanced my shooting.”
jeff davis –
We appreciate you taking the time to share your satisfaction and highest rating with us.
Charles Butler (verified owner) –
“This reloading powder is exceptional. It delivers reliable performance and consistent accuracy, making it a great choice for all my reloading needs.”
jeff davis –
Your kind words just made our days! Thank you so much!
Emery Bennett (verified owner) –
“This powder has made a noticeable difference in my reloading. It offers reliable performance and consistent accuracy, which has greatly improved my shooting.”
jeff davis –
Thank you so much for your 5-star review! We will share this with the store team to let them know to keep up the amazing work.
Mia Hughes (verified owner) –
“One of the best powders on the market. It offers a clean burn and consistent performance, making it a must-have for any serious reloader.”
jeff davis –
Your kind words just made our days! Thank you so much!
Savannah Hughes (verified owner) –
“I’m extremely satisfied with this powder. It offers consistent accuracy and a clean burn, which has greatly enhanced my shooting performance.”
jeff davis –
Thank you for your kind review! It’s a big encouragement to us!
Julian Rogers (verified owner) –
“I’m very impressed with this reloading powder. It offers reliable performance and consistent results, making it a great addition to any reloading bench.”
jeff davis –
Thank you so much for your 5-star review! We will share this with the store team to let them know to keep up the amazing work.
Gabriel Scott (verified owner) –
“One of the best reloading powders on the market. It offers reliable performance and a clean burn, making it a must-have for serious reloaders.”
jeff davis –
Your kind words just made our days! Thank you so much!
Aubrey Jenkins (verified owner) –
“I’m extremely happy with this reloading powder. It offers consistent results and a clean burn, which has greatly improved my shooting accuracy.”
jeff davis –
Thank you for your kind review! It’s a big encouragement to us!
Olivia Collins (verified owner) –
“Great reloading powder! It offers reliable performance and consistent accuracy, making it a must-have for anyone serious about reloading.”
jeff davis –
Thank you for your kind recognition, customer’s satisfaction is always our goal.
Mia Campbell (verified owner) –
“I’m very impressed with this powder. It delivers reliable performance and consistent accuracy, making it a top choice for any reloading needs.”
jeff davis –
We love your feedback! Thank you for choosing our product!
Sebastian Gray (verified owner) –
“This reloading powder is exceptional. It offers reliable performance and consistent accuracy, making it a great addition to my reloading bench.”
jeff davis –
We’re glad you are satisfied with our item! Will do our best to keep improving it in the future.
Sadie Griffin (verified owner) –
“I’m very satisfied with this reloading powder. It offers consistent accuracy and a clean burn, making it a great choice for precise shooting.”
jeff davis –
Thank you so much for taking the time to leave us a 5-star rating – it’s much appreciated!
Lily Scott (verified owner) –
“I’m extremely impressed with this powder. It delivers a clean burn and consistent performance, making it a top choice for any serious reloader.”
jeff davis –
Thank you so much for taking the time to leave us a 5-star rating – it’s much appreciated!
Hudson Jenkins (verified owner) –
“Reliable, consistent, and easy to use. This reloading powder has become my go-to for all my reloading needs. The results speak for themselves, with improved accuracy and performance in every load. Highly recommended!”
jeff davis –
We’re glad you are satisfied with our item! Will do our best to keep improving it in the future.
Stella Scott (verified owner) –
“This powder has made a noticeable improvement in my reloading. It delivers a clean burn and consistent performance, making it a valuable addition to my setup.”
jeff davis –
We appreciate you taking the time to share your satisfaction and highest rating with us.
Gabriella Rivera (verified owner) –
“This powder has made a noticeable improvement in my reloading process. It delivers consistent results and a clean burn, making it a top choice.”
jeff davis –
We appreciate you taking the time to share your satisfaction and highest rating with us.
Mackenzie Patterson (verified owner) –
“I’ve been using this powder for a while, and it never lets me down. The clean burn and consistent performance are perfect for my needs.”
jeff davis –
Your kind words just made our days! Thank you so much!
Hazel Butler (verified owner) –
“This powder is fantastic. It delivers consistent performance and a clean burn, making it a valuable addition to my reloading bench.”
jeff davis –
Thank you so much for your 5-star review! We will share this with the store team to let them know to keep up the amazing work.
Caleb Walker (verified owner) –
“This reloading powder has exceeded my expectations. It provides reliable performance and consistent accuracy. I will definitely be using it regularly.”
jeff davis –
We love your feedback! Thank you for choosing our product!
Ellie Perry (verified owner) –
“I’m very impressed with this reloading powder. It offers reliable performance and consistent results, which have greatly improved my shooting.”
jeff davis –
Thank you so much for taking the time to leave us a 5-star rating – it’s much appreciated!
Eliana Rogers (verified owner) –
“This powder has made a noticeable improvement in my reloading process. It offers consistent results and a clean burn, which is exactly what I needed.”
jeff davis –
We appreciate you taking the time to share your satisfaction and highest rating with us.
Ellie Butler (verified owner) –
“This powder has made a noticeable improvement in my reloading process. It offers consistent accuracy and a clean burn, which has greatly enhanced my shooting.”
jeff davis –
We appreciate you taking the time to share your satisfaction and highest rating with us.
Luca Mitchell (verified owner) –
“I’ve been reloading for years and have tried many different powders. This reloading powder is one of the best I’ve used. It burns cleanly, provides consistent results, and is easy to measure. Highly recommend it to anyone looking for a reliable powder for their reloading needs.”
jeff davis –
We appreciate you taking the time to share your satisfaction and highest rating with us.
Hazel Collins (verified owner) –
“Exceptional quality and performance. This powder provides a clean burn and consistent results, making it a top choice for reloading.”
jeff davis –
We love your feedback! Thank you for choosing our product!
Elijah Jenkins (verified owner) –
“One of the best powders I’ve used. It provides reliable performance and consistent results, making it ideal for all types of reloading applications.”
jeff davis –
Thank you for your kind review! It’s a big encouragement to us!
Sienna Bailey (verified owner) –
“Fantastic quality and performance. This powder provides reliable results and a clean burn, making it an essential part of my reloading setup.”
jeff davis –
We’re glad you are satisfied with our item! Will do our best to keep improving it in the future.
Thomas Taylor (verified owner) –
“This powder has made a noticeable improvement in my reloading process. It delivers reliable performance and consistent accuracy, which has greatly improved my shooting.”
jeff davis –
Thank you for your kind recognition, customer’s satisfaction is always our goal.
Nolan Gray (verified owner) –
“I’m very pleased with this powder. It delivers reliable performance and consistent results, making it a valuable addition to any reloading setup.”
jeff davis –
Thank you for your kind recognition, customer’s satisfaction is always our goal.
Ellie Thompson (verified owner) –
“I’ve been using this powder for a long time, and it continues to impress. The consistent results and clean burn are perfect for my reloading needs.”
jeff davis –
We appreciate you taking the time to share your satisfaction and highest rating with us.
Roman Hall (verified owner) –
“I’m extremely satisfied with this powder. It offers reliable performance and consistent accuracy, making it a great choice for precise shooting.”
jeff davis –
Thank you for your kind review! It’s a big encouragement to us!
Justin Hernandez (verified owner) –
“I’m impressed with how well this powder performs. It delivers consistent results and a clean burn, making it a great choice for any reloader.”
jeff davis –
We’re glad you are satisfied with our item! Will do our best to keep improving it in the future.
Jackson Foster (verified owner) –
“Exceptional quality and performance. This powder offers a clean burn and consistent results, making it ideal for all reloading needs.”
jeff davis –
Thank you so much for your 5-star review! We will share this with the store team to let them know to keep up the amazing work.
Chase Garcia (verified owner) –
“I’m very impressed with this powder. It offers reliable performance and consistent results, which have significantly enhanced my shooting accuracy.”
jeff davis –
Thank you for your kind recognition, customer’s satisfaction is always our goal.
Ryder Thompson (verified owner) –
“This powder has exceeded my expectations. It delivers consistent results and a clean burn, making it a valuable addition to any reloading setup.”
jeff davis –
Thank you for your kind review! It’s a big encouragement to us!
Landon Garcia (verified owner) –
“Great reloading powder! It provides a clean burn and consistent performance, which has enhanced my overall reloading experience.”
jeff davis –
Thank you for your kind recognition, customer’s satisfaction is always our goal.
Skylar Collins (verified owner) –
“Exceptional quality and performance. This powder delivers consistent results and a clean burn, making it ideal for all types of reloading.”
jeff davis –
Thank you for your kind recognition, customer’s satisfaction is always our goal.
Vivian Rivera (verified owner) –
“Fantastic quality and performance. This powder offers consistent results and a clean burn, making it a top choice for all types of reloading applications.”
jeff davis –
We love your feedback! Thank you for choosing our product!
Paisley Long (verified owner) –
“I’m thrilled with this powder. It offers reliable performance and consistent results, making it an essential part of my reloading setup.”
jeff davis –
Thank you so much for your 5-star review! We will share this with the store team to let them know to keep up the amazing work.
Gianna Butler (verified owner) –
“Great reloading powder! It provides a clean burn and reliable performance, making it ideal for all types of reloading applications.”
jeff davis –
Thank you so much for your 5-star review! We will share this with the store team to let them know to keep up the amazing work.
Ryder Long (verified owner) –
“I’m very satisfied with this reloading powder. It offers a clean burn, consistent performance, and is easy to measure. Highly recommended!”
jeff davis –
Thank you so much for your 5-star review! We will share this with the store team to let them know to keep up the amazing work.
Alexa Campbell (verified owner) –
“I’m extremely happy with this powder. It provides reliable performance and consistent accuracy, making it a must-have for my reloading setup.”
jeff davis –
Thank you for your kind review! It’s a big encouragement to us!
Evelyn Foster (verified owner) –
“Fantastic reloading powder! It provides consistent results and a clean burn, which has greatly enhanced my reloading experience.”
jeff davis –
Thank you for your kind recognition, customer’s satisfaction is always our goal.
Jessica Brown (verified owner) –
“Fantastic reloading powder! It provides reliable performance and a clean burn, which has significantly improved my shooting accuracy.”
jeff davis –
We’re glad you are satisfied with our item! Will do our best to keep improving it in the future.
Jennifer Lopez (verified owner) –
“I’m very pleased with this reloading powder. It delivers excellent performance, with consistent results every time. Great for both beginners and experienced reloaders.”
jeff davis –
Thank you so much for taking the time to leave us a 5-star rating – it’s much appreciated!
John Smith (verified owner) –
“I’m extremely pleased with this reloading powder. It offers consistent accuracy and a clean burn, making it a top choice for all my reloading needs.”
jeff davis –
We’re glad you are satisfied with our item! Will do our best to keep improving it in the future.
Sofia Rivera (verified owner) –
“This reloading powder has made a significant difference in my shooting. It offers a clean burn and reliable performance, which is exactly what I needed.”
jeff davis –
Thank you for your kind review! It’s a big encouragement to us!
Miles Jenkins (verified owner) –
“This powder offers top-notch performance. The consistent burn and reliable results make it a standout choice for my reloading needs.”
jeff davis –
We’re glad you are satisfied with our item! Will do our best to keep improving it in the future.
Aurora Rogers (verified owner) –
“I’m extremely satisfied with this reloading powder. It offers consistent results and a clean burn, which has greatly improved my shooting performance.”
jeff davis –
We appreciate you taking the time to share your satisfaction and highest rating with us.
Isaiah Perry (verified owner) –
“Fantastic quality and performance. This powder provides consistent results and a clean burn, making it a valuable addition to any reloading setup.”
jeff davis –
We love your feedback! Thank you for choosing our product!
Gabriella Brown (verified owner) –
“I’m extremely pleased with this powder. It offers a clean burn and consistent results, making it a must-have for any serious reloader.”
jeff davis –
Thank you so much for taking the time to leave us a 5-star rating – it’s much appreciated!
Brayden Morgan (verified owner) –
“I’ve found this powder to be incredibly reliable. It provides consistent results and a clean burn, which is essential for accurate shooting.”
jeff davis –
Thank you for your kind review! It’s a big encouragement to us!
Michelle Martin (verified owner) –
“This reloading powder is exceptional. It provides reliable performance and a clean burn, making it a top choice for anyone serious about reloading.”
jeff davis –
Thank you so much for your 5-star review! We will share this with the store team to let them know to keep up the amazing work.
Isaiah Jenkins (verified owner) –
“Outstanding quality and performance. This powder offers a clean burn and reliable results, making it a top choice for any reloader.”
jeff davis –
We appreciate you taking the time to share your satisfaction and highest rating with us.
Victoria Walker (verified owner) –
“I’m very satisfied with this powder. It provides reliable results and consistent accuracy, which has significantly enhanced my shooting performance.”
jeff davis –
Thank you so much for your 5-star review! We will share this with the store team to let them know to keep up the amazing work.
Ryder Scott (verified owner) –
“One of the best reloading powders I’ve used. It offers a consistent burn, great accuracy, and is easy to measure. A must-have for any reloader!”
jeff davis –
Thank you so much for taking the time to leave us a 5-star rating – it’s much appreciated!
Scarlett Jenkins (verified owner) –
“I’m extremely pleased with this powder. It delivers reliable results and consistent accuracy, making it a top choice for all reloading applications.”
jeff davis –
Thank you so much for your 5-star review! We will share this with the store team to let them know to keep up the amazing work.
Ruby Hughes (verified owner) –
“This powder has transformed my reloading experience. It provides consistent results and a clean burn, making it a top choice for my needs.”
jeff davis –
Thank you for your kind recognition, customer’s satisfaction is always our goal.
Ruby Garcia (verified owner) –
“I’m very satisfied with this powder. It delivers reliable performance and consistent results, making it a great choice for reloading.”
jeff davis –
We love your feedback! Thank you for choosing our product!
Anthony Baker (verified owner) –
“Fantastic quality and performance. This powder provides consistent results and a clean burn, making it ideal for all types of reloading applications.”
jeff davis –
Thank you so much for taking the time to leave us a 5-star rating – it’s much appreciated!