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MR-7-45 · January 18, 2012, 01:19 PM

When loading for the M-1, use IMR4895 and a 150 gr bullet. The issue is the gas port and operating rod. Commercial loads in the M1 will eventually damage the operating rod. They do make an adjustable gas plug.

Here is a link for M1 load data credited to the NRA
http://masterpostemple.bravepages.com/M1load.htm

If I remember correctly milspec brass may have crimped primer pockets. Those pockets can be swaged to accept a good primer.

You want to make sure to fully seat the primer since the M1 has a free floating firing pin and a primer not seated properly could result in a "slam fire".

January 18, 2012, 01:19 PM	#4
MR-7-45 Member Join Date: October 4, 2005 Location: Central Texas Posts: 70	When loading for the M-1, use IMR4895 and a 150 gr bullet. The issue is the gas port and operating rod. Commercial loads in the M1 will eventually damage the operating rod. They do make an adjustable gas plug. Here is a link for M1 load data credited to the NRA http://masterpostemple.bravepages.com/M1load.htm If I remember correctly milspec brass may have crimped primer pockets. Those pockets can be swaged to accept a good primer. You want to make sure to fully seat the primer since the M1 has a free floating firing pin and a primer not seated properly could result in a "slam fire".