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P-990 · February 22, 2006, 02:26 PM

The extra port pressue of the slower burning 4350 will tend to over-operate your Garand. Say hello to bent op-rod. Not recommended.

This can be a problem. Around my place I load H4350 for the 1903A3 Springfield, but my dad uses IMR-4895 for the M-1 Garand. Have to be careful not to get the Springfield ammo into the M-1, but the M-1 ammo won't hurt the '03A3. I've recently loaded some rounds with Varget, aiming for 2600-fps or so with a 168, hoping this will work well in both the gas gun and the bolt gun.

But the common advice is don't use powders significantly slower than 4895 and 4064 in the GI gas guns. This is one area where the AR-15 direct-impingment system is superior to the M-1/M1A system, IMO.

February 22, 2006, 02:26 PM	#5
P-990 Senior Member Join Date: May 2, 2002 Location: Only1/2WayThere Posts: 1,316	The extra port pressue of the slower burning 4350 will tend to over-operate your Garand. Say hello to bent op-rod. Not recommended. This can be a problem. Around my place I load H4350 for the 1903A3 Springfield, but my dad uses IMR-4895 for the M-1 Garand. Have to be careful not to get the Springfield ammo into the M-1, but the M-1 ammo won't hurt the '03A3. I've recently loaded some rounds with Varget, aiming for 2600-fps or so with a 168, hoping this will work well in both the gas gun and the bolt gun. But the common advice is don't use powders significantly slower than 4895 and 4064 in the GI gas guns. This is one area where the AR-15 direct-impingment system is superior to the M-1/M1A system, IMO. __________________ NRA Master, Highpower Rifle, Across-the-Course NRA Expert, Highpower Rifle, Mid-Range Prone