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Author Topic: How big is "12/mm"...?  (Read 2363 times)

Offline sse

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How big is "12/mm"...?
« on: August 30, 2013, 12:58:21 PM »
That's what it says on the barrel of the little derringer, per Spain, just picked up...They oughta talk 'merican...!
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Offline Voyageur

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Re: How big is "12/mm"...?
« Reply #1 on: August 30, 2013, 01:03:34 PM »
~ 7/16"---The factor is 25.4 mm/ in......"Doc" :hairy
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Offline sse

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Re: How big is "12/mm"...?
« Reply #2 on: August 30, 2013, 01:06:30 PM »
Quote from: "Voyageur"
~ 7/16"---The factor is 25.4 mm/ in......"Doc" 8)
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Offline R.M.

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Re: How big is "12/mm"...?
« Reply #3 on: August 30, 2013, 01:10:34 PM »
.472"
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R.M.
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Offline sse

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Re: How big is "12/mm"...?
« Reply #4 on: August 30, 2013, 01:13:30 PM »
Quote from: "R.M."
.472"
Thank you, sir...most stand-up on your part!

So, then what size stuff do you feed it?  Anybody know?  I'm gonna be in some card games on the river, with some pretty iffy rascals, and I'll need a little protection...!!!  LOL
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Offline R.M.

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Re: How big is "12/mm"...?
« Reply #5 on: August 30, 2013, 01:23:57 PM »
That kinda depends, is it rifled or smooth, front stuffer or cartridge? What does the bore actually measure?
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R.M.
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Offline sse

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Re: How big is "12/mm"...?
« Reply #6 on: August 30, 2013, 01:31:59 PM »
It's a muzzlelaoder.  Lookin at it right now...does not appear to have any rifling at the muzzle, and a rudimentary measure of the bore shows more like 11/mm, not 12/mm.
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Offline R.M.

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Re: How big is "12/mm"...?
« Reply #7 on: August 30, 2013, 01:36:30 PM »
11mm is pretty darn close to 7/16 or 44 cal. Comes out to .433". There should be balls in the .420" neighborhood with an appropriate patch.
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R.M.
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Offline sse

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Re: How big is "12/mm"...?
« Reply #8 on: August 30, 2013, 01:39:37 PM »
Thanks a bunch, R.M... :bow

Looks like it will be "trial and error" to get this right...meantime, "I'll see that and raise ya..."
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Offline R.M.

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Re: How big is "12/mm"...?
« Reply #9 on: August 30, 2013, 01:43:08 PM »
Call
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R.M.
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Re: How big is "12/mm"...?
« Reply #10 on: August 30, 2013, 01:51:50 PM »
Quote from: "R.M."
Call
poker face!
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Re: How big is "12/mm"...?
« Reply #11 on: August 30, 2013, 02:24:47 PM »
Low res pic, but here's the little gipper right here:

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Offline R.M.

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Re: How big is "12/mm"...?
« Reply #12 on: August 30, 2013, 02:31:11 PM »
Do you have any .440" balls, intended for a 45? See if they drop down without a patch. Looks like TOW has a great assortment of balls in that range.
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R.M.
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Offline sse

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Re: How big is "12/mm"...?
« Reply #13 on: August 30, 2013, 02:36:43 PM »
Thanks for asking.  

I went round and round on this regarding a .44 that I have.  I did find some excellent sources for a wide range of diameters/sizes.  I'm sure I'll get something to match up.  I do wish the bore was rifled, but ce la vie...don't think the bad guys will be any further than 5 paces, or so...
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Offline R.M.

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Re: How big is "12/mm"...?
« Reply #14 on: August 30, 2013, 02:39:10 PM »
Cross Table accuracy is all a fellow needs.
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R.M.
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