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Author Topic: WHAT DIA. IS THE BORE ON A ??40 CAL BARREL??  (Read 439 times)

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Offline jbtazgrabber

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WHAT DIA. IS THE BORE ON A ??40 CAL BARREL??
« on: December 17, 2004, 04:59:47 PM »
I FOUND A HI WALL BARREL IN SOMETHING 40 CAL? INEED TO KNOW WHAT THE BORE DIA WAS...???ANY HELP??
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Offline Ray Newman

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WHAT DIA. IS THE BORE ON A ??40 CAL BARREL?
« Reply #1 on: December 17, 2004, 05:39:57 PM »
.40-60 Win .404
.40-65 Win .406
.40-70 Win .405
.40-72 Win .406
.40-82 Win .406
.405 Win .412

These are from "Cartridge of the World", 5th edition, p. 137.

However, I have no idea as to how well Winchester held to these dia.

What are the manufacturer’s stamp(s) & caliber marking(s) on the barrel?

Just because it is a M1885 (AKA High Wall) barrel, doesn't necessarily mean that it is a Winchester caliber. You’ll need to a chamber cast to find out for sure. It could have been re-bore or relined over the years or it may have started out--if it is a M1885 barrel--as a special order caliber.  @ one time, Winchester would build anything as long as the buyer had the money.
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Grand PooBah
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Offline jbtazgrabber

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NN
« Reply #2 on: December 18, 2004, 01:48:06 PM »
YES ITS BEEN RELINED IT WAS A 45..70 NOW 40 SOMETHING???NO STAMPES  THE OWNER CANT REMEMBER FOR SURE....IM WANTING TO MAKE A 10MM OUT IF IT....WHAT DIA DOES THAT GOOD BOOK SAY A 10M.M. IS...???? THANK YOU    ,,,JB
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Offline Ray Newman

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WHAT DIA. IS THE BORE ON A ??40 CAL BARREL?
« Reply #3 on: December 18, 2004, 04:29:51 PM »
A 10MM what? There are agreat number of 10MM rifle & pistol loads.

Or if you know what you're looking for, do a Google, yahoo, etc. search....
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Grand PooBah
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Offline jbtazgrabber

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nn
« Reply #4 on: December 18, 2004, 05:38:56 PM »
i guess im just  a little forgetfull today <trying to move> i ment to say 10m.m.pistol sorry im being stupid today tomorrow MIGHT be better...yea right.. :-D  :-D
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Offline Ray Newman

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WHAT DIA. IS THE BORE ON A ??40 CAL BARREL?
« Reply #5 on: December 19, 2004, 08:04:55 AM »
The SAAMI 10mm specs should be easy to find on net as I really don't dauble too much w/ modern calibers.

However, deepending upon the weight & length of the bullet you plan to utilize in the 10mm, your barrell's rate of twist might make it unstable.

Before proceeding any further, I'd slug the bore & measure the twist rate to determine excatly what you're dealing w/.
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