Alright ... so I've been crunching some numbers and such, and I've been trying to come up with this thing to make timing something like a muzzle device easier. This is what I've come up with: A threaded barrel with a thread pitch of 5/8 - 24 has a 5/8" inch threaded diameter and 24 threads per inch of threaded barrel. Every 360 degree turn of a device advances the device 1/24th of an inch. 1/24 = 0.04166666666 inch 0.04166666666/ 360 = 0.00011574074 Every degree turned advances the device 0.00011574074 inch So if my device, torqued down to spec is advanced 45 degrees ahead of being timed, I would have to create a shim that is 0.00520833333 inch. So my math would look like: t = threads per inch deg = degrees advanced s = shim (t/360)(deg) = s Someone check to see if I'm off ... I know there's some machinists and engineering types on here.