Win/Browning Boss TPI size?

[Nvreloader]

Does anyone KNOW the thread size for the Winchester/Browning Boss adjustable bbl tuner/muzzle brake, this is for the threads on the bbl end??
This is for the Laredo 7mm Mag LRM Win barrel.

I am comning up with some wierd measurements and I think it's METRIC.

Tia,
Don

 

[M-61]

What measurement are you getting?

 

[wapiti25]

The std contour barrels are in 1/16's but the number of threads per inch are non-std. I suggest you use a thread pitch gauge and the dia of the threads. It will be something like 11/16-27.

 

[Nvreloader]

M-61
I am getting .620" and 24/25 tpi, 24 is a little on the tight side and 25 is a little on the loose side.

I don't have a Metric TPI gage yet, it is comning.
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Wapiti 25,

This is the threads on the BOSS END of the bbl.

Tia,
Don

 

[wapiti25]

.620" is a 5/8" (.625") with the crest knocked off. What are you going to do? Are you going to make your own BOSS or break? You can thread in a lathe by single point and play with the dia to make it work. Go with the pitch that looks to be the closest. Make a copy of the BOSS end of the barrel, measure the threads with thread wires to get the same dia as the barrel.