What would be wrong with steel cased ammo in a bolt action rifle? Not a lot of wear/tear compared to a semi/full auto rifle.
For sighting it in, how many rounds will it take? Three or four 3 shot groups? To find out where it hits at 200/300 yds.? A couple of 3 shot groups at each distance.
Hunting? On a good day of groundhog hunting I've shot up to 4 of the little suckers. I guess some people live in areas were you don't have to "hunt" them though. Just drive around and shoot them from the truck/ATV. But for the 7.62X39 it'll be bigger stuff, mostly. How many deer/hogs a day?
That steel cased ammo can shoot some pretty good groups in the right rifle.
I might, I say might, because I've seen some of the Silver Bear soft points shoot scary good groups out of a cheap old AK, and it might do very well in a bolt action rifle, too, even hunt with the steel cased ammo with the right bullets. That way I wouldn't worry about losing my brass either. I lost two pieces of .308 brass when deer hunting at home. I can take you right to those two spots. For some reason it really got my goat to lose those two pieces of brass, even though both brought down nice bucks.
Good luck, with which ever one you buy. I saw a whole table of CZ rifles at the gun show the other day. Not a couple, a whole table of nothing but CZ rifles. I only looked at them from a "man, those are pretty (wood/checkering/bluing) standpoint and didn't even look to see what models or calibers they were. They were just really pretty rifles.