You speak of Accuracy..99% of weapons, wether it be handgun or rifle, is more accurate than the person shooting it. Sure if you shoot 200 rds or more at a time, it may be affected. I used mine for Prairie dog shooting one spring, and the "accuracy" did diminish when the barrel got hot. I don't care what you shoot or what it costs, the same will happen. Ammo has it effects also. Shoot Wolf ammo, then say Hornady, and see a difference. A Mini 14 is capable of shooting 500 rounds or more before it needs to be cleaned. I rest my case..