This is a small ring mauser action these were rebarreled on, they were used with the spanish govt's version of a 7.62 designed for the CETME semi-auto rifle,which had a lighter load than your commerical .308,The CETME rifle had a adjustable gas system and it could handle any NATO 7.62 ammo just by making a adjustment to the gas system. They figured the light loadings would work in the bolt guns, and very probably knew this conversion was pushing it, even so, the lighter loading pushed the small ring action to the limit, add to the fact that these rifles are known to be "soft" that is, the steel in the receivers,bolts, was'nt heat treated very well, and were much softer than a german or swede made small ring action would have been,and could cause what's known as "receiver lug set back" this is where the lugs on the bolt literally slam into the receiver locking lugs, and actually dent the locking lugs on the receiver,at this point, the receiver is pretty much junk, and continued shooting only makes this condition more dangerous as it increases your headspace,The small ring action is a poor choice for a cartridge like a .308, The spanish mauser 1916 rifles are known for lousy heat treating processes. I'd pass..these are in my opinion dangerous conversions...if you want a mauser in this caliber, start with a good Model 98 action,(large ring) either a German(up to about 1943) or Czech(pre WWII) made actions, both are high quality, excellent grades of steel,excellent heat treating, and will handle a .308 easily.....