There is something of importance to note on these guns. this is a 1893 spanish mauser action, and is not noted for it's incredible strngth. In fact, many regard the spanish mauser with derision because of some soft steel used in the guns, and as these guns were orginally chambered in 7x57, which was not a hi-pressure number, as opposed to the 308 which was many decades later, which was quite hi-pressure. I would council against ANY full power loadings of the 308. Consider factory ammo the hottest, and try to avoid surplus
If you do choose to fire it in this manner, you will find that it shoots very high, the reason being that the spanish called the 7.62x52 the CETME, which was downloaded in performace and pressure to about 300 savage levels. I would suggest that if you hand load then download accordingly. if you are not a handloader, then you are better off to go with the reduced recoil line of cartridges for the gun.
Note that there are those that will poo-poo what I have written above, but much research will show that it is historical fact regarding the building of these guns and thier history. You can probably shoot it somewhat short-term and ignore me, but you are risking failure at some point in the future, and with 60,000 psi going off near your face, is it worth it?
I am not saying that it is a bad gun. I have one of the guns not so-converted (the 1916, I think it is called), I just use it as it was designed to be used, and so should you