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Old 08-02-2020, 09:49 AM
Protocall_Design Protocall_Design is offline
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If you want the gun to shoot a group, you need to crown the muzzle with a piloted cutter to make the crown concentric to the bore. If you want to do the ball and valve grinding compound after that, you will be OK, it will follow what is already there. Without the piloted cutter, or a lathe, the crown is likely to be off center.
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