Exit diameter of linear comp?

[kbarnes12]

I got a good deal on a linear comp, but it is 1/2x28. I can have a local machine shop rebore and rethreaded to 9/16x24. It is for a .223 now, so what size should the hole where the bullet exits comp be bored to for the 6.5 Grendel?

[A.D.D. AR]

6.5mm is .264'' plus you need twenty thousandths (.020'') overbore clearance- some people say up to thirty thousandths overbore is fine- I have always gone .020'' over and had good luck. Guys with more experience feel free to chime in.
-mike

[XOOFP]

You may already know about these guys, but just in case you didn't... I believe they'll bore and thread to your specs. Pretty work IMO.

http://archonmfg.com

[kbarnes12]

I already have the comp, its made by Kaw Valley Precision. But they only do 1/2x28, and 5/8x24, so I figure a local machine shop should be able to fix it at a reasonable price.

[NugginFutz]

Just curious, but whose barrel is it, that you need 9/16 x 24 threading?

[kbarnes12]

Just curious, but whose barrel is it, that you need 9/16 x 24 threading?

Alexander Arms.