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Re: Chamber pressure standards at London Proof House Douglass A. Craig #282268 06/22/12 06:22 PM
Joined: Jan 2002 Posts: 11,571 Likes: 165 Iowa L. Brown Sidelock
L. Brown Sidelock Joined: Jan 2002 Posts: 11,571 Likes: 165 Iowa	There's no difference, to my knowledge, between the two British proofhouses. Information I have from the Birmingham Proofhouse states that standard proof guns (formerly marked 850 bars, now STD under a crown) were proofed to a pressure equivalent to 13,920 psi. The former magnum proof was 1200 bars (now marked SUP under 2 crowns) and equates to a pressure of something over 19,000 psi.

Entire Thread
Subject	Posted By	Posted
Chamber pressure standards at London Proof House	Douglass A. Craig	06/22/12 07:21 PM
Re: Chamber pressure standards at London Proof House	L. Brown	06/22/12 10:22 PM
Re: Chamber pressure standards at London Proof House	Douglass A. Craig	06/23/12 03:53 AM
Re: Chamber pressure standards at London Proof House	Anonymous	06/22/12 10:39 PM
Re: Chamber pressure standards at London Proof House	gunman	06/23/12 09:41 AM
Re: Chamber pressure standards at London Proof House	L. Brown	06/23/12 11:15 AM
Re: Chamber pressure standards at London Proof House	Anonymous	06/23/12 01:08 PM
Re: Chamber pressure standards at London Proof House	Small Bore	06/23/12 01:27 PM
Re: Chamber pressure standards at London Proof House	Terry Lubzinski	06/23/12 06:09 PM
Re: Chamber pressure standards at London Proof House	Stallones	06/23/12 07:44 PM
Re: Chamber pressure standards at London Proof House	Douglass A. Craig	07/09/12 04:55 PM
Re: Chamber pressure standards at London Proof House	lagopus	07/09/12 05:04 PM
Re: Chamber pressure standards at London Proof House	Douglass A. Craig	07/09/12 06:19 PM
Re: Chamber pressure standards at London Proof House	Small Bore	07/09/12 07:02 PM
Re: Chamber pressure standards at London Proof House	L. Brown	07/09/12 08:54 PM
Re: Chamber pressure standards at London Proof House	Small Bore	07/10/12 08:29 AM
Re: Chamber pressure standards at London Proof House	L. Brown	07/10/12 04:40 PM
Re: Chamber pressure standards at London Proof House	Salopian	07/10/12 08:45 AM
Re: Chamber pressure standards at London Proof House	Douglass A. Craig	07/10/12 03:46 PM
Re: Chamber pressure standards at London Proof House	Small Bore	07/10/12 09:31 PM
Re: Chamber pressure standards at London Proof House	L. Brown	07/11/12 03:12 PM
Re: Chamber pressure standards at London Proof House	Small Bore	07/11/12 04:40 PM
Re: Chamber pressure standards at London Proof House	Chuck H	07/12/12 10:11 AM

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