Need help with thread sizes for muzzle brakes

[Beelzebub]

I've got three rifles I am seriously thinking about putting brakes on. If I list the caliber and outside diameter of the barrel can someone tell me the largest (OD) and smallest (AND STILL SAFE) thread acceptable.


6MM OD = .810

6MM OD = .540

277 OD = .660


thanks in advance for any assistance,
Beelz

 

[orwapitihunter]

6mm (.810")
1/2x28 tpi (small)
9/16x24 tpi (medium)
5/8x24 tpi (large) <--My choice

6mm (.540")
These are the ones I hate. For me, there just isn't a warm and fuzzy feeling on this one.
(1/2") = Not as much shoulder, as i would like, for the brake to seat against. And if the bore isn't centered in the barrel it makes it even worse.
(7/16") = Not a commonly offered muzzlebrake thread diameter. Also getting kinda thin between the bore and the threads.
If forced to put a brake on this one I would look for a very fine thread in 7/16", or make my own.

.277 (.660")
1/2x28 tpi getting a little on the small side.
9/16x24 tpi <--My choice
5/8x24 tpi getting too big for a good shoulder for the brake to seat against.

The TPI's that I listed are just a common choice. If the brake you want is offered in 32 tpi instead of 28, it will work fine.

 

[Beelzebub]

6mm (.810")
1/2x28 tpi (small)
9/16x24 tpi (medium)
5/8x24 tpi (large) <--My choice

6mm (.540")
These are the ones I hate. For me, there just isn't a warm and fuzzy feeling on this one.
(1/2") = Not as much shoulder, as i would like, for the brake to seat against. And if the bore isn't centered in the barrel it makes it even worse.
(7/16") = Not a commonly offered muzzlebrake thread diameter. Also getting kinda thin between the bore and the threads.
If forced to put a brake on this one I would look for a very fine thread in 7/16", or make my own.

.277 (.660")
1/2x28 tpi getting a little on the small side.
9/16x24 tpi <--My choice
5/8x24 tpi getting too big for a good shoulder for the brake to seat against.

The TPI's that I listed are just a common choice. If the brake you want is offered in 32 tpi instead of 28, it will work fine.

XXXXXXXXXXXXXXXXXX

Thanks much for the info. I was a little worried about the Model 7 243 also. I'm braking it for my grandson.

Appreciate you,
Beelzebub