The mini 14 is a fun rifle, however I would go with an AR 15 in 5.56, it allows for more options to build on. I have not shot a 6.8 yet but have heard good things about it for 300yd and in rifle. I have used a NM AR15 with MK262 type ammo for hunting deer in south west Texas and it works very well. I shoot the head or spine right in front of the shoulder blades. Personally I prefer the AR15 system, but the mini 14 my brother had was a fun rifle and reminded me of the M14 alot. It's a good feeling rifle, but the cost to dress it up or replace parts is very costly and I am not sure what the accuarcy is like...