you want cheap...5.45x39.
if you want 7.62x39 get the 300 bo instead and just use it as a sub 200 yard deer harvester.
if you want long range go 6.5 grendel.
or you can just stick with the 5.56/.223 and use specialized hunting rounds and cheap...well maybe not right now cheap...plinker ammo when you feel the need to bumpfire.
Assumption is the mother of all ****ups.
Know what you know, Know what you don't know. -Paul Pedzolt
"Jack of all trades, master of none, though oftentimes better than master of one" -Mynshul