I was lucky enough to have bought some pretty cool milsurps over the last 20+ years when the supply and variety were much greater, and the prices way lower. I tried to stick to calibers that were easy to source, and for which there was either cheap surplus ammo, or commercial ammo available for when the milsurp dried up. I don't reload. I even ended up selling a Lee Enfield No4MKIT, Swedish M96B and a Swiss K31, all top notch surplus rifles, because of the relative difficulty in obtaining ammo. I only bought designs that I considered historically significant and in calibers I found interesting. I'd likely never buy a Carcano.
If all you want to do is shoot, then you'll be much better served with a Ruger American, Predator, etc., or a Savage 110 type rifle in .223, .308, or 6.5 Creedmoor if you don't mind paying a little more for ammo.
If you really want a cheap surplus rifle, which these days will likely cost more than a cheap or used modern rifle such as the above, then I recommend you go no lower than an "8mm" Turkish Mauser. Even though I own a few Mosin Nagants, the designs and workmanship are extremely rudimentary, with the exception of the reworked Finns, which have become very expensive. Look for a Mauser, even if it's a Turkish, Yugoslavian refurb, etc.
Good luck on your search!