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Yep The Can I bet. Baffle strikes are not needed to upset a bullets flight. Make sure can is tight Fire 3 rounds check for keyholing if keyholing then take off can put a shim on and reapply the can. Test fire again. try this 3 or 4 times to see if it stops

as stated check bore for rifling also check the markings on the barrel. Even DPMS barrels shouldnt keyhole.