Need .375 H&H load for 300gr. cast boolit

[dh2]

I got a new mould and want to try it a 300gr FP with GC I want to push it 1600 to 1800 FPS
Power I have that come to mind
H4895 would be my first choice if supply was not low and servile rifles feeding off of it
IMR 4064 stand by for the .375 H&H
SR-4759 good cast boolit powder
IMR 4198 also good cast boolit powder, my first choice if I can get data.
I do have other options for powder but these come to mind for this project

[skeettx]

I use about 58 grains of 4831

http://castboolits.gunloads.com/showthread.php?203721-375-H-amp-H-Mold&highlight=375449 (http://castboolits.gunloads.com/showthread.php?203721-375-H-amp-H-Mold&highlight=375449)

http://50caliberforum.proboards.com/thread/2884

[onceabull]

30.0 gr IMR 4198 should get you into the fps range you want... Onceabull

[Kraschenbirn]

The latest Lyman Cast Bullet manual doesn't give any data for a 300-grainer in the .375 H&H but does list IMR4198 with the 335-grain Lyman 378674 starting at 25.0 gr (1314 fps) with a max. of 36.0 gr. (1725 fps). With your lighter boolit, I believe I'd start at around 26-27 grains and work up until accuracy starts to drop off.

Bill

[Larry Gibson]

H4895 would be my first choice if supply was not low and servile rifles feeding off of it
IMR 4064 stand by for the .375 H&H

Either of those would be my choice also. I use a milsurp 4895 (close to 4064 in burn rate) under a 270 gr 375449 cast in my own M70 three six bits. I use 49 gr with a Dacron filler and run 2150 fps. For a comfortable load at 1900 fps I use 43 gr of the 4895 with the Dacron filler. AA5744 is an excellent powder that doesn't need the Dacron filler.

Larry Gibson