Sporter Barrel Muzzle Threading

[AverageJoe90]

Good morning. I know this has probably been beat to death, but I still couldn't find a definitive answer after my research. I want to put a muzzle break on a 300 win mag that I have. The rifle is a Red Hawk Rifles Alaskan ti clone with a sporter barrel. The muzzle measures .656 at the end, so it's too small for 5/8x24 threads. Could I get away with 9/16x24 threads, or do I need to find a gunsmith to make an adapter, to thread onto the end of the barrel that will accept 5/8x24?

The rifle is a shooter, so I'm hoping I won't degrade the accuracy doing this. Does anyone recommend a gunsmith in the Helena, MT area to perform the work? Thanks for the help fellas.

 

[Old Rooster]

That would have to be a gunsmith operation. When Dennis Earnhardt was at Capital Sports he did them but since he retired I don't know.
Their gunsmithing is good quality so I would check with them. Dennis has a brother that has a gunsmithing shop on Montana Avenue North going toward Bobs Valley Market. I think it is Wild West Gunsmithing. He is very sharp and most likely does adapters for muzzle breaks/cans but can't remember his name.

 

[AverageJoe90]

Thanks for the info! I'll swing by both places and pick their brains.

 

[Old Rooster]

I just checked and Dennis owns the gun shop called Frontier Gun Shop on North Montana. Can't remember his brothers name that used to work at Capital Sports and retired. Dennis is sharp and re-barreled a rifle for my brother in law that shoots lights out but Capital Sports has done work for me in the past and is great also. No bad decision either way.
Let me know which way you go as I need to do the same but keep putting it off.

 

[A-Tip]

I am not sure how much material a gunsmith needs but 5/8 is .625 when converted to a decimal. The threading might still be feasible.

 

[cajun]

If you do a search there was a thread about this recently.