Don't use any CAC military FMJ that is the biggest killer of rifle barrels the Cordite is extremely errosive and the primers contain mercury
if you have or get some pull the projectiles and bin the powder and cases, I had a few hundred of the projectiles they shot around 1.5 MOA
at 200 metres, If the barrel looks ok it would pay to have it re-crowned a slight ding in the crown is the cause of many bad groups.
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