Prior written consent of the Copyright holder. Note: The posting of Copyrighted material on this forum is prohibited without This is a public un-moderated forum participate at your own risk. #Shotgun barrel wall thickness gauge updatemakes no commitment to update the information contained herein. may make changes to these materials, or to the products described therein, at any time without notice. shall not be liable for any special, indirect, incidental, or consequential damages, including without limitation, lost revenues or lost profits, which may result from the use of these materials. further does not warrant the accuracy or completeness of the information, text, graphics, links or other items contained within these materials. A lot of doubles caught my eye from this great 16 gauge Woodwards O/U to this fantastic, 12 gauge J.P. THESE MATERIALS ARE PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANT-ABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. Julia Auction Company a few weeks ago looking over the shotguns in their March 11 & 12 sale. assumes no responsibility for errors or omissions in these materials. USA These materials are provided by as a service to its customers and may be used for informational purposes only. Sponsors & Advertisers | DoubleGun Rack |Ĭopyright (c) 1993 - 2022. 6mm (.024").Ĭertainly bbls have passed proof with thinner walls in the forward portion, but personally I would not feel comfortable with any less in the chamber area & more would be better. It was further stated the minimum thickness in the forward third of the bbls should be. No mention of reduction for the smaller bores. This was stated to be with "Ordinary Good Steel" while if "Sppecial Steel" was used these could be reduced by no more than. Unless a very long cone the cone will normally taper more than the OD of the bbl so "Ahead of the cone (as in front of it/forward) will be thicker than behind it (breech side) as well as the pressure will be lower there than at chamber end.Ī book I purchased many years ago (copyright 1966) entitled "The New Hunter's Encyclopedia" had some figures they quoted as being from the German proof houses which stated min wall at forward end of chamber should be in 12, 16 & 20 ga's 2.3mm ((.0905") & for the 24 & 28 ga's with their higher pressures 2.4mm (.0945"). The point where the chamber meets the cone is generally the most critical point in a shotgun bbl. Just to be certain we are all on the same page in saying "Ahead Of" the forcing cone are we speaking of the juncture of the chamber with the cone or the junction of the bore with the cone.
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