Barrel Set Back 2

[Louis.J]

I screwed up my first question, what I meant to ask is if I have 20 degress to go to get to TDC how does one figure out what that equates to in thousands of an inch to be removed.

 

[Jerry H]

.00347

 

[mwezell]

The math would go like this...360/20=18 or 1/18th of a turn. Covert that to a decimal by dividing 1 by 18. That's .0555556. Mutiply that by .0625. Like Jerry said, you get .0034722, but sneak up on it if you can by checking due to slight crush.

 

[Superman]

The math is real easy.

1 divided by threads per inch

A Remington action is 16tpi

1 divided by 16 = .0625

If you needed to go 1/4 of a turn, you divide that by 4 and you'll need to remove .0156" from the shoulder. If you need to go 1/2 a turn take .031 off the shoulder. Of course it helps if you do this before you chamber the barrel.