Originally Posted by CHARLIEDUECE65
So what is the minimum break wall thickness. I have a factory rem 30 cal barrel with a .644 muzzle. I bought a harrels break with a .750 od/9/16x32 thread. Will it be safe to contour this brake to the muzzle contour or close to it? I realize the walls are going to be really thin. Thanks
Based on my conversations with barrel makers and engineers I made a simple guideline for tenon and thread size. it is based on .150 minimum barrel wall thickness between the minor diameter
of the threads and the rifle bore.
This minimum thickness is what the barrel makers use to flute a barrel, The thinnest number they gave me was .137 (depending on cartridge pressure and bullet diameter to) .150 thousandths.so
in order to error on the side of caution it did my calculations based on .150 thousandth wall.
A simple way to figure it is to take the bullet diameter, and add .300 thousandths. that will give you the Recommended barrel diameter for installing a thread for the brake. (Different thread pitches have different minor diameters but the .150 should cover it as long as you have enough barrel left over to have a shoulder to seat the brake against.
Hear is a link that may help.
www.jecustom.com - FAQ's
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