gkcf 8 Posted December 12, 2009 Report Share Posted December 12, 2009 I'm planning a home built weapon, a semi-auto pistol using 30 carbine ammo. I'm probably going to need a barrel custom made for the project, so before I got too far ahead of myself, I wanted to ask the pros here. How do I figure out how the thick the chamber portion of the barrel needs to be? The chambers on my .45 and on the S12 don't look that beefy to me, but then I get to my AR and it's ridiculously thick compared to the other two. I assume that's because it uses rifle cartidges that have more pressure? I really don't know, that's why I'm asking. Also, I posted this here because I was looking for answers this year. Any help at all will be appreciated. Quote Link to post Share on other sites
G O B 3,516 Posted December 12, 2009 Report Share Posted December 12, 2009 Go with the recommendation of a reputable barrel manufacturer! Quote Link to post Share on other sites
gkcf 8 Posted December 12, 2009 Author Report Share Posted December 12, 2009 I dont know of any. Quote Link to post Share on other sites
sonnydazegunsmithing 42 Posted December 12, 2009 Report Share Posted December 12, 2009 the barrel on a amt 30 cal is the same od as a 45 barrel Quote Link to post Share on other sites
gkcf 8 Posted December 13, 2009 Author Report Share Posted December 13, 2009 That helps a bit. I suppose I need a custom barrel manufacturer or something. I wonder if I could rechamber and contour and AK barrel? Quote Link to post Share on other sites
G O B 3,516 Posted December 13, 2009 Report Share Posted December 13, 2009 The chamber thickness is not just caliber specific, you also need to take into account the metallurgy of the particular barrel, chrome molly or ordinance steel is stronger that mild carbon steel, and these are only 2 of many different types of steel that a barrel may be made of. Also, re-contouring a hammer forged barrel may induce warpage due to uneven internal stresses. There are many manufacturers of barrels and barrel blanks. Do an Internet search and purchase a nice blank with cut rifling. The barrel is the heart and soul of a weapon, don't cheap out there. You may also want to search for home gun smithing forums, as there is a wealth of information available just for a few mouse clicks! Do your research and be safe, then have fun! Quote Link to post Share on other sites
gkcf 8 Posted December 14, 2009 Author Report Share Posted December 14, 2009 Hey, thanks for the advice, I appreciate it. I'll start looking a bit harder and see what I can turn up. Quote Link to post Share on other sites
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