If you pull the factory ammo bullet and weigh the powder, you will know if it will work in the M1 Garand. 52 grs or less should be good to go. Powder charge weight is what gets the op rod. A slow burn powder takes large amounts to get good velocity. Medium burn rates take around 50 grs to get good velocity. So if the factory load has the 50 to 52 gr charge it will work good with the Garand.C-dub wrote:Hold on a second. Are you talking about modern ammunition? Does anyone concur with this?Hamourkiller wrote:I think you enjoy will the rifle and shooting the normal Winchester and Remington 150 gr Factory loads will not harm the beast.
If you faint at the prospect that the op rod will bend and jump out and beat you up, well get an adjustable gas screw and tame the beast.
Some people would have the M1 loaded down to 300 savage levels for fear of the op rod, I just keep my powders around 50 grs and my bullets at 150 to 168 and target 2700 fps for the 168 and 2800 for the 150 gr bullets.
Have fun and enjoy the rifle.