I have three of them. For the most part, they're good rifles. Some of the old '91 long guns were cut down into carbines/sporters and those are the ones that can have problematic accuracy. I've got an old '91 that was sporterized but not with a cut barrel. Cajunlawyer commented when I got it that it was probably someone's old swamp boat gun, and I think he was right. I got it off AA from a gunstore/pharmacy in a town in rural Georgia if I remember right.
Then I bought a carbine off the forum and another sporter off AA. Only I didn't pay attention with Sporter number two. It's in a nice Fajen stock and a slick little gun, but it was/is a 7.35mm and not a 6.5mm.
6.5mm ammo is actually easily had and not terribly expensive. Prvi loads it, though some people consider it blasting ammo, since the bore diameter of Carcanos varies, it doesn't produce great accuracy in all of them. Norma, Hornady, and a number of cottage producers also load it.
I've seen Graf and Sons list Prvi cases for 7.35mm, but they've always been out of stock when I've looked. Only a few cottage makers offer 7.35mm ammo, cost is about a dollar a round to two dollars, depending who you get it from. No worse than many other calibers really.
A forum friend got me some on clips in the original boxes that was laying around his local gunshop back during the panic for ammo. Someone else still got a good part of that supply from the shop before he went back for more, so I wasn't the only one that stock piled 7.35mm.
I think it was Bruce HMX, apologies if it was someone else that posted it, that said they'd known someone who'd damaged a rifle firing surplus 7.35mm that was hot and presumably machine gun ammo (strips of it for I think it was the Breda still turn up).
A guy in Italy paid a pretty sum for some of my empty 7.35mm original ammo boxes. Maybe they were rare, I don't know.
My guns are all Ternis. Make you a hell of a deal on all three if promise to show me pictures of the lamp that ought be made out of the old '91...