Commercial 30-06 vs Garand ammo - powder charge , pressure too much can bend the operating rod
I am unsure @ 308 commercial versus 30 caliber Garand food.
IMHO as long as pressure is equal or less than 30 caliber Greek HXP or similar your fine. 308 Garand uses same components except barrel and in some old Navy conversions same barrel with chamber insert,
as alleycat suggested by an adjustable gas plug and dont worry
I am unsure @ 308 commercial versus 30 caliber Garand food.
IMHO as long as pressure is equal or less than 30 caliber Greek HXP or similar your fine. 308 Garand uses same components except barrel and in some old Navy conversions same barrel with chamber insert,
as alleycat suggested by an adjustable gas plug and dont worry