I have a BFR that was converted to 50 Alaskan by Jack Huntington.The barrel length is 6-3/4"
and it has an integral muzzle break. After firing the Grizzly 525 grain factory load, I
decided to work up suitable handgun loads for this gun. It only took about a week for my
knuckle's swelling to subside. The devit in my forehead will just be a battle scar.(joking)
Doing a bunch of internet searching netted me nothing so I started with a known
powder that is used in this caliber. IMR 4198 was my choice and a 510 grain LFN plain base
bullet at a hardness of about 18 BHN. I know its frowned upon, but I chose to take up the
"space in the case" with GRITS. Brass was fire formed 348 Winchester trimmed to 2.100"
Primers were WOLF large rifle.
These are my results. all are 10 shot group averages with the chronograph at 8' from muzzle.
Temperature was 58-61 degrees
28.0 grains 4198 = 855 FPS
30.0 grains 4198 = 940 FPS
32.0 grains 4198 = 977 FPS
34.0 grains 4198 = 1060 FPS
36.0 grains 4198 = 1087 FPS
38.0 grains 4198 = 1135 FPS
40.0 grains 4198 = 1183 FPS
42.0 grains 4198 = 1252 FPS
44.0 grains 4198 = 1350 FPS
46.0 grains 4198 = 1407 FPS
48.0 grains 4198 = 1494 FPS
50.0 grains 4198 = 1502 FPS
52.0 grains 4198 = 1556 FPS