True. But OP has tight spots in his barrels. The point I was trying to make is groove diameter is bigger. A pin gauge can't get to it, either .223" or .224".Originally Posted by lysander
Anyway, I have slugged barrels with lead balls from shot shells or even lead sinker. Didn't think of pellet. A .22 pellet can be squashed fatter to fit.
-TL
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