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"In" and "out" of proof? #523032 09/13/18 08:34 AM
Joined: Dec 2017 Posts: 149 Likes: 5 SE Michigan rtw OP Sidelock
OP rtw Sidelock Joined: Dec 2017 Posts: 149 Likes: 5 SE Michigan	I don't understand bore diameter and its impact on proof. Why, for a 12 gauge, is a bore diameter of .740 or under "in" proof, but one of .743 is "out" of proof? I can understand that a gun that is out of proof will be harder to sell and will sell for less than one in proof. Any issue with a gun increases buyer resistance and the price gets lowered as a result. But, I do not understand the technical aspects. Does the greater bore diameter increase the risk of gas blowback? Is it possible for a gun with a .743 diameter to be reproved? Can someone point me to an article that explains this? Thank you. Last edited by rtw; 09/13/18 08:35 AM.

Entire Thread
Subject	Posted By	Posted
"In" and "out" of proof?	rtw	09/13/18 01:34 PM
Re: "In" and "out" of proof?	Mark II	09/13/18 01:56 PM
Re: "In" and "out" of proof?	Drew Hause	09/13/18 03:06 PM
Re: "In" and "out" of proof?	KY Jon	09/13/18 03:07 PM
Re: "In" and "out" of proof?	2-piper	09/13/18 03:46 PM
Re: "In" and "out" of proof?	Drew Hause	09/13/18 04:15 PM
Re: "In" and "out" of proof?	L. Brown	09/13/18 09:57 PM
Re: "In" and "out" of proof?	12boreman	09/15/18 11:34 PM
Re: "In" and "out" of proof?	ed good	09/16/18 12:41 AM
Re: "In" and "out" of proof?	Geo. Newbern	09/16/18 12:32 PM
Re: "In" and "out" of proof?	Drew Hause	09/16/18 01:48 PM
Re: "In" and "out" of proof?	Owenjj3	09/17/18 02:07 AM
Re: "In" and "out" of proof?	2-piper	09/17/18 11:45 AM
Re: "In" and "out" of proof?	ed good	09/17/18 02:49 PM
Re: "In" and "out" of proof?	Owenjj3	09/17/18 03:08 PM
Re: "In" and "out" of proof?	Toby Barclay	09/17/18 06:08 PM
Re: "In" and "out" of proof?	ed good	09/17/18 06:13 PM
Re: "In" and "out" of proof?	rtw	09/18/18 12:12 AM
Re: "In" and "out" of proof?	Owenjj3	09/18/18 01:17 AM
Re: "In" and "out" of proof?	ed good	09/18/18 02:45 AM
Re: "In" and "out" of proof?	2-piper	09/18/18 03:10 AM
Re: "In" and "out" of proof?	Owenjj3	09/18/18 12:20 PM
Re: "In" and "out" of proof?	2-piper	09/18/18 12:57 PM
Re: "In" and "out" of proof?	ed good	09/19/18 12:30 AM
Re: "In" and "out" of proof?	L. Brown	09/20/18 03:18 PM

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