I have used 748 win powder with good results. I don't remember the load but the burn rate and pressures are very close to 4895. The factory pressure for mil. spec load is 50000 psi. The rifle will handle about twice that with out blowing up. The rifle was tested for that much back during the origional tests. It was then fired several thousand more rounds. The weak link is the op rod as high port pressure will bend it. Remember these rifles are more than 50 years old, so pay attention as to what you feed them, and they will make another 50.Looking for some load data and a little feedback , or personal knowledge some of you have had with loading this gun, what pressures this gun should be held under etc, 150 grn , 165grn bullet, Thanks
The problem here is not one of pressure, but of port pressure. Port pressure is the amount of pressure remaining in the barrel of a gas-operated firearm, when the bullet passes by the gas port. The Garand was designed for use with medium burning rate powders 4895 and IMR 4064. Using a slow-burning powder such as 4831, even if the load develops relatively mild chamber pressure, will still give excessively high port pressures. This causes violent cycling of the action and can result in a bent operating rod. Load your Garand with only those medium-burning powders which are compatible with its gas system.