Snowbird
Well-Known Member
When threading a thin contour, does it matter if you have a .10 shoulder if you're running a quick detach system like keymo? I'm struggling with what contour bbl to go with on a Tikka t3 that will allow 5/8x24 threads on a 20" bbl. I realize the threads alone need .650 but how much shoulder is needed and how do you know what a barrel will measure at a particular length? So far all is see are muzzle measurements for longer barrels and I'm just guessing at the other measurements.