I acquired some reloaded 30-06 ammo from my dad. The only thing marked on the box is 57.3 grs of 4350. This stuff is over 25 years old and he does not remember who loaded it for him. When I looked up this powder for 30-06 that was a max load for a 150 gr JSP. I don't want to pull the bullet so I wieghed the cartridge. It has a total weight of 400 grs. If I knew the weight of an empty Winchester 30-06 cartridge then I would know the bullet weight and I could determine if that was a safe load for the gun. Have any of you used 57.3 grs of 4350 in a 30-06? I am assuming it is IMR because of the age. Thanks for any help.