top of page

IMR 4451 Enduron

You need to be a member to bookmark a  load!

>> My bookmarks
IMR 4451 Enduron powder load data

Powder Specifications:

Propellant / Powder:
IMR 4451 Enduron
Relative Burn Rate:
2.1 (0 ... slow| 10 ... fast)
Weapon Use:
Rifles
Density:
100.51lbs/ft3 | 1610kg/m3
Bulk Density:
56.75lbs/ft3 | 909kg/m3
PID:
PID_133
Last updated:
2/18/2025
IMR

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.

Find all IMR load data in the powder manufacturer section.

Suitable and popular calibers for IMR 4451 Enduron

The following table indicates  for which caliber and bullet weight range (in grains) this powder is suitable (👍) and popular among our reloading community (👍👍).  This might evolve over time as more community members share their loads and as we accumulate more calculations and tests with our balistics calculator.

Bullet Weight (gr) ->
0-50
50-75
75-100
100-150
150-200
200-300
>300
bottom of page