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Old 01-12-2017, 10:34 AM
oldgutpile oldgutpile is offline
 
Join Date: Jan 2009
Location: Brooks
Posts: 2,242
Default bore sizes

I've used cast bullets of .504-508 in my 577/500 and it slugs out at .512. The black powder bumps it up to fit perfect, with no change of impact. The paper-patch adds a bit too though.
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