If its Five groove rifling make sure you measure several times and average. Lead projectiles arent really fussy generally anywhere from 3-7 thou over bore diameter is fine under sized is not so flash and will cause more leading than being oversize.
If its Five groove rifling make sure you measure several times and average. Lead projectiles arent really fussy generally anywhere from 3-7 thou over bore diameter is fine under sized is not so flash and will cause more leading than being oversize.
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