Gunsmithing Muzzle threads

[CowboyBart]

My Forbes Rifle in 30-06 is beating me up! The light rifle with a stoutly loaded 180gr is just a bit too much to call "fun" to shoot. I want to put a brake on it. The OD is .610". Does 1/2-28 make the barrel too thin for a high pressure 30 cal? Will I have enough shoulder if I go 9/16-24?

 

[Steel head]

You can also look at a Witt machine bolt on.
They are surprisingly effective

 

[Zak Smith]

For subsequent suppressor mounting, the minimum shoulder we recommend for 9/16-24 threads is 0.662"

An alternative would be to have it index on the muzzle and not the rear shoulder.

 

[FisherT&C]

You can do a 1/2×28, I recommend the APA micro bastard "Answer" brake. They do a 1/2×28 .30cal. one. The answer brake is also tunable, it's my go to for light rifles.

 

[Im2bent]

Muzzle threading Thompson Center break action single shot rifles the LRI way. :)

My turning center lacks the spindle bore diameter to do these. Up until about a year ago we had to decline this type of work just because I lacked the resources. 5 axis mills solve this pretty easily... We've been vetting this process now for about a year with killer results. Kinda neat.

www.snipershide.com

talks about wall thickness.

 

[Wannashootit]

.30 cal with 1/2" threads leaves minimal barrel wall thickness.
I've done it - but it's not optimal and to be avoided if possible IMO.

There is definitely not enough shoulder for suppressor alignment using 9/16"- but for brake only I would go 9/16" instead of 1/2" to get better barrel wall thickness, and use Rocksett to assure the brake retains alignment with minimal torque against the skinny shoulder.

As mentioned you could use custom brake with an internal torque shoulder to index off the muzzle, but even a skinny .025 shoulder is enough to get a brake aligned in my own experience.

 

[CowboyBart]

No can in the future for this gun, just the brake.

 

[RG0099]

I put a Witt machine bolt on, on a Tikka T3 lite 7mm Rem Mag. Made a huge improvement

 

[LeftyJason]

Just got my T3x lite back from Thunderbeast after I had them thread the muzzle 9/16 with the muzzle face index like @Zak Smith mentioned. The muzzle on my Tikka measured 0.616". Took a week from when I mailed it to getting it back.