I assume you mean 7.62x39?
I have one from the original batch that came in. Fantastic rifle. I used to shoot primarily MFS cheap-o stuff, but have switched to Chinese surplus for the time being. Both work fine. I wouldn't say it is particularly accurate using milsurp ammo, but I shoot with zero magnification, so my expectations are low beyond 50 yards. At 50 yards I can consistently get 10 rounds in a 3 inch circle.
+ Rifle is well built, despite early QA issues. I've not used a drop of loctite!
+ 10 round 7.62x39 magazines!
+ Rifle is super easy to clean - easiest I own
+ looks cool
+ non-restricted
+ Cheap ammo
- Front heavy, but I guess it's not a carbine
- 7.62x39 ammo is pretty much always 123-125 grain FMJ or SP. There isn't a significant amount of variety which limits you to a certain degree.
I'll say this, the XCR is fantastic.
If you want accuracy and somewhat inexpensive ammo, go with the .223
If you want accuracy and hunt medium size game, go with the 6.8 SPC
If you want super cheap ammo, go with the 7,62x39