I deer hunt with a 1891 Argentine Mauser made in 1984 and I love it! The 7.65 is a heavy hitting round with more than enough power to knock deer down at range. The only thing that sucks is you need a LER scope for it and buy a base to replace the rear sight if you want to put an optic on it, unless you pay to get it drilled and tapped.
Issues I've heard of are light primer strikes from springs made in the late 1890's. I replaced mine with a Blitzensprang spring and it lights rounds off like a champ. A couple other of my buddies will own them and had similar issues with either worn out firing pins or springs. Numrichs has them instock and so does Sarco if I remember right. Another comes from idiots hot-loading them and setting the bolts back in the receivers, which isn't so much a problem with the Arg, but anything that is hot loaded to the point of failure.
Use the ammo right for the Argentine and it will serve you fine.
Your rifle, while the machining is great, is still an 1890's design,made of 1890's plain carbon steels, and made under the primitive process controls of the period.
I've heard this over and over and can't help but wonder. If the 1891 Arg is such a 'primitively' made rifle, why haven't I heard of one blowing up? People shoot rifles a lot older than 1891 manufacture and walk away fine because they follow the rules.
Hot loading from a machinist's stand point makes no sense at all. Why would you want to torque and beat metal to the highest it can go for any reason? Why risk blowing your bolt/pieces of your weapon into your face for a few extra MPS?