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causes of keyholing
rifle: RRA tactical car 14.7" 1:9 twist.
ammo: Ga arms 55 gr
last few times ive been to the range i noticed that the majority of my rounds are keyholing. anyone know of some causing factors of this?
i havent had the chance of trying any other types of ammo yet to see if thats the prob. as all im sitting on is a slew of ga arms canned heat ammo.
all i know is the rifle did not use to do this at all, theres only been around 3k rounds through this barrel. even with the same ammo. ive had the barrel cut down to govt profile/14.7inch from a 16", dont know if this would be a benefiting factor or not. any ideas?
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