Thread: .500" barrels

I`S not so technical, find a 42 tooth gear and drill a hole every forth one, easy-peasy. Also may be able to fix up the six grove .510" barrel, have made up a new T/C cutter that's 0.133" wide so the lands and groves will be the same, that's .510"x pie / divided by 12 =0.133" . So reset barrel up in lathe and recut rifling then a good polish. It`s still not to the standed .50cal, should be drilled hole =.492", ream to .494" cut rifle 0.003" deep =.500" bore. My drill leaves a hole of .5009", bugger, so has to be for lead bullets only as jacketed ones are .500" dia my bore is .510" =.511/12" bullets. the number 7 rifling disc
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