While we now sell direct-to-consumer on our own websites, we prioritize our shipments to our traditional sales channels to maximize powder availability at sporting goods and gun shop retailers everywhere.
We place limited powder inventory for sale on a regular basis on our website. When we are sold out, we are sold out.
We do not take backorders and our Tech Services team cannot take orders via email or phone.
The max order quantity of any powder SKU is 5 and we will only accept one order, per customer, per calendar month with a maximum weight of 48lbs.
Products purchased on our site are NOT FOR RESALE.
PLEASE NOTE: All orders ship within 10-15 business days. Please refer to our Sales and Shipping Policy for more information.
IMR Enduron 4451 is a versatile, match-grade propellant with a mid-range burn speed in the Enduron line. It is an extruded powder and is perfect for cartridges like 270 Winchester, 30-06 or 300 Winchester Short Magnum, among others.
The main features of the Enduron series are copper fouling eliminator, insensitivity to temperature changes, ideal loading density and being environmentally friendly.
This propellant performs comparably to Hodgdon H4350 but charge weights are materially different.
IMR recommends always consulting www.IMRReloading.com for the most accurate, up-to-date data.
Most Accurate Powder with 123 -grain bullets in .260 Rem
Tried several powders while developing loads for a Remington 700 5R Milspec in .260 Remington. IMR-4451 gave the best accuracy, even over the vaunted H-4350, using 123-grain bullets. Happy with results!
12-Sep-2020
Name
Grassl
Powder
This powder works great, vary reliable and consistent. This powder performs like a higher end powder. This will be my new go to powder for 6.5 creedmoor.
20-Sep-2020
Name
Mike
IMR4451
I loaded 200 cartridges in 6.5 Creedmoor using Lapua brass with small primers and 135 grain A-tip bullets. I used these at a 1000 yard training class and the powder performed excellently. The first morning was below freezing and the second day was 45 degrees. No change in trajectory from one day to the next, and I was getting 2775 fps with a 42.8 grain load which was mildly compressed in my once fired brass. I noticed excellent consistency with this powder and consider it as good as H4350.
06-Apr-2021
Name
TomS
IMR 4451 30-06 loads
This has become my go to when I can't find any 4895. Shoots super clean with good velocities. I use 54grs with the 168gr HPBT and 55grs with 150gr HPBT. Highly recommend if you usually load 4895 and can't find any.
16-Apr-2021
Name
GERALD DILGARD
4451,My rifle loves it.
I have played with a lot of powders and IMR 4451 keeps turning up as one of the best. My 6.5 CM just loves 41.3 grains under a 143gr ELD-X bullet. Set at 2.820 Coal. Great deer load and all the holes touch at the range. Tends to shoot best just a little under max.
23-May-2021
Name
colin
very pleased
This seems to be a consistent and clean burning powder suitable for my 6.5 Creedmoor. Velocities are not the fastest available but here you dont have much soot and it meters well.
28-May-2021
Name
Jimmie
Imr 4451
Simply amazing!! Works well in many calibers! I am shooting almost hole for hole with 25 06 and 280, definitely my new go to powder
29-May-2021
Name
William Belcher
Accurate powder
Had difficult time getting a new Christiansen Arms Ridgeline to group. Was using STaBall with mixed results, mostly bad. Tried H4350, better, but not great. Had 2 cans of 4451,started at 46 grains, working up to 47.2 when I hit a very good node. 5 shots inside. .5 inches, best 3 shot group was .343, 5 shots at .567 inch. 139 SST, Lapua brass, federal LR match primers. Very pleased now.
Tried several powders while developing loads for a Remington 700 5R Milspec in .260 Remington. IMR-4451 gave the best accuracy, even over the vaunted H-4350, using 123-grain bullets. Happy with results!
This powder works great, vary reliable and consistent. This powder performs like a higher end powder. This will be my new go to powder for 6.5 creedmoor.
I loaded 200 cartridges in 6.5 Creedmoor using Lapua brass with small primers and 135 grain A-tip bullets. I used these at a 1000 yard training class and the powder performed excellently. The first morning was below freezing and the second day was 45 degrees. No change in trajectory from one day to the next, and I was getting 2775 fps with a 42.8 grain load which was mildly compressed in my once fired brass. I noticed excellent consistency with this powder and consider it as good as H4350.
This has become my go to when I can't find any 4895. Shoots super clean with good velocities. I use 54grs with the 168gr HPBT and 55grs with 150gr HPBT. Highly recommend if you usually load 4895 and can't find any.
I have played with a lot of powders and IMR 4451 keeps turning up as one of the best. My 6.5 CM just loves 41.3 grains under a 143gr ELD-X bullet. Set at 2.820 Coal. Great deer load and all the holes touch at the range. Tends to shoot best just a little under max.
This seems to be a consistent and clean burning powder suitable for my 6.5 Creedmoor. Velocities are not the fastest available but here you dont have much soot and it meters well.
Simply amazing!! Works well in many calibers! I am shooting almost hole for hole with 25 06 and 280, definitely my new go to powder
Had difficult time getting a new Christiansen Arms Ridgeline to group. Was using STaBall with mixed results, mostly bad. Tried H4350, better, but not great. Had 2 cans of 4451,started at 46 grains, working up to 47.2 when I hit a very good node. 5 shots inside. .5 inches, best 3 shot group was .343, 5 shots at .567 inch. 139 SST, Lapua brass, federal LR match primers. Very pleased now.