Threaded barrel for brake

[cdschoonie]

If memory serves, the OD of the 300 was .560, but I’ll check again tomorrow

 

[cdschoonie]

If memory serves me, I believe you need a minimum muzzle end diameter of 0.70"-0.75" for a proper shoulder to threaded a muzzle brake. If you have calipers you can measure it.

There are "clamp-on" brakes out there you can find through Google that have good reviews but I have no experience with them or know of anyone who has.

https://kahntrol.com/index.php/muzzle-brakes/clamp-on-muzzle-brakes/

https://www.wittmachine.net/custom-clamp-on-muzzle-brake.html

Savage prefit barrels
https://criterionbarrels.com/products/prefits/savage-pre-fit-barrels/

I would look at a clamp on brake first before buying a prefit barrel. Depending on barrel contour of a prefit, you may need to open you barrel channel on the stock or possibly purchase a different stock.

I like the reviews on the Witt Clamp-on, I think I’m going to order one. They look awesome and at $100, would be cheaper than buying a new barrel. If they are as good as reviewed, it’s a no brainer for my situation. Thank you for giving me the link!

 

[PBramble]

According to his measurements, the 300WM measures about .556, the 6.5 measures .81. these would be approximates based off of his measurements. According to JECustoms:
.308 bore needs .648 barrel diameter minimum. .264 bore needs .604 barrel diameter