Useable M1 Garand Ammo

[Jim Oliver]

I have been under the impression that the problem with current commercial ammo is the powder burning rate.

If I'm right, the correct burning rate powder is/was IMR 4895 (or equivalent), IMR 4064 is pretty close.

The pressure/time curve is supposed to be the important factor. IMR 4895, or equivalent, has a pressure/time curve that allows the pressure to drop to an acceptable level before the bullet passes the gas port.

Slower burning powders still have too much pressure as the bullet passes the gas port, causing excess pressure to be introduced into the gas system, damaging (sometimes bending) the op rod.

All this may, or may not, be correct..............but it sounds right

[KamRent]

Remove the stock from the rifle when cleaning. The blow-by of gases will also get to the barrel underside. Some gets past the piston. Clean the bolt face also.