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britrifles View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote britrifles Quote  Post ReplyReply Direct Link To This Post Posted: September 07 2019 at 8:11am
Originally posted by Honkytonk Honkytonk wrote:

Not sure why I didn't think of this earlier. The Great Plains bullets have 4 "rings" on them. I put the calipers on them. The top and bottom rings are .50". I'll check the muzzle end measurement later but I'm guessing which ever lube I use, it'll be a tight fit with ANY fouling!

HT, that’s what I suspected.  If you have a slightly oversized lead ball, you can slug the barrel.  How many groves in the rifling?  If an even number it should be easy to get bore diameter. 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Honkytonk Quote  Post ReplyReply Direct Link To This Post Posted: September 07 2019 at 11:29am
I have never slugged a barrel. I'm just kind of and old Bubba guy. I did put the calipers for an inside measurement (well, at least the first 1/2" of the very end of the muzzle). I went all around the bore. The largest measurement I got was .50". the smallest was .48". That is a tight bore for those bullets regardless of lube. Rate of twist? No idea... 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Shamu Quote  Post ReplyReply Direct Link To This Post Posted: September 07 2019 at 4:30pm
Easy to find out.
Wrap a lubed patch round your ramrod with the cleaning jag fitted.
run a strip pf masking tape along the length of the ramrod, 24" or so.
Tap it into the bore to get it started, no more.
Mark the tape on the ramrod, above the muzzle about 20"(align with front sight blade).
Slowly drive rod in one full rotation of the mark.
Make a new mark with tape.
Withdraw rod, measure from 1st to 2nd mark thats your twist rate. 1 in (x) inches!
Is it (theroretically) a .50 caliber?
If so I can mail you a few .490" balls & some matching patches (lubed) for my .50. Load 'em up, shoot them using a blow tube & see if it works better.

Don't shoot till you see the whites of their thighs. (Unofficial motto of the Royal Air Force)
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