Installing a muzzle brake on a Kimber Montana

[CaNINE]

I ordered a factory brake from Kimber for my 280AI.  The brake is pitched 7/16x28.  Leave it to Kimber to pick an odd thread pitch.  Trying to determine the right tenon to use.  Any of you guys install one of these brakes?

[Reidus]

What do you mean by the right tenon to use?

[724wd]

sounds like he's wondering what diameter to turn the barrel down to before threading? 

[Reidus]

For a 7/16 thread, that would be 7/16 tenon. You can look up the thread specs for the tolerances.

[CaNINE]

sounds like he's wondering what diameter to turn the barrel down to before threading? 

Yes this is what I was looking for. We contacted a couple different barrel manufacturers and confirmed .435.  It’s a toothpick of a barrel.

[Reidus]

Leaves you 77 thou wall.... not much, especially after you consider thread depth....pencil barrel is right.

[CaNINE]

If I never post again to this forum you’ll know what happened. 

[Magnum_Willys]

.035 thickness at base of threads.   Not much but still would be hold 1500-3000 lbs.  shoukd be fine.  If not you may end up shooting a 1200 grain brake at your target.   Hehe