Wait till the barrel is off & clean thread with tap.
Wait till the barrel is off & clean thread with tap.
+ and it is 6-48 tpi. When I installed the new barrel on mine, I chased the threads on all base holes. I do this on any new rifle I’m installing a base on. If the base(s) are already installed, I remove them and do it anyway. You can’t properly torque screws with crud in the threads.
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