If you're in a position to obtain ammo that cheap & accurate then that's great.
Unfortunately, here in Australia the cheapest ammo you'd get would be at least $20 per 20 rounds and with more performance, big flexibility in projectiles and considerable savings most regular shooters with a 6.5x55 handload.
Privi Partizan is probably in the realms of $75 to $80 per 100 if you get a good deal when they're available but as it's also the most anaemic load out there you'd probably only go in for a deal like that once in order to build up brass.
I think some of the most interesting bullets on offer are the 140gn and 160gn Woodleigh Protected Point bullets, similar to Mag Tips, but no one factory loads these, mores the pity.