Could it be a bit of fuzz where the bolt lugs sit when close (don't know the technical term for those) maybe when no ammo there is enough room for them but when on a round it binds up. you could try a bit of lube on the lugs and see if it helps
Could it be a bit of fuzz where the bolt lugs sit when close (don't know the technical term for those) maybe when no ammo there is enough room for them but when on a round it binds up. you could try a bit of lube on the lugs and see if it helps
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