My biggest single problem with a mini-30 is that it's American. The advantage of rifles that shoot 7.62x39 ammo is that it is cheap. The BAD NEWS is, it is inferior quality. A friend of mine got a Makarov as a gift from a girlfriend, and he asked me what kind of ammo to use in it. I really didn't know, so I did some digging, and the rule I came up with is, "Use Russian ammo in Russian guns. Don't use Russian ammo in American guns." It could be lacquered, corrosive, hard-cased, whatever. The Russians designed their guns specifically so that they wouldn't have to make high-quality ammo for it to function. (Quantity v Quality yet again.)
You can shoot dirty ammo all day long in a Russian gun and not worry about it. You can skip cleaning your SKS and not worry about it. (I do.) But if I have a mini-30 or a 7.62 upper on an AR, I would suddenly find myself counting magazines and anticipating failure to feed. In buying an American rifle chambered for Russian ammo, you are giving up the main advantage of an SKS/AK. Lots of cheap, low-maintenence shooting. The flip-side of this, if you have one of the AKs chambered for 5.56, you can use the Wolf ammo in it and not worry. Maybe I'm being too picky.