Squeaky 135 Posted May 6, 2019 Report Share Posted May 6, 2019 Hi guys: I've learned more terminology. Per a previous post, I've been wondering about custom barrels. One specific question I have is what determines the barrel shank's length (chamber end)? I've seen some barrel profiles with it at 3". Others at 5". Does it matter? Thanks! Quote Link to post Share on other sites
saltydecimator 482 Posted May 10, 2019 Report Share Posted May 10, 2019 hmmm i have noooooo i dea... the only things im thinking about are it shouldnt really matter? i turned a barrel OD down for a 3-4'' gas system shortening, and it takes aloooooootta meat off it back to near where the forcing cone is. folks do it, so i assume it doesnt impart "grenade" characteristics Quote Link to post Share on other sites
G O B 3,516 Posted May 11, 2019 Report Share Posted May 11, 2019 Pressure is greatest at the chamber, and decreases as the bullet travels down the barrel increasing the volume that the gas has to expand into. I would be hesitant to turn a barrel down too close to the chamber. 1 Quote Link to post Share on other sites
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