Threading a .308

[Gman021]

I have an SPS Varmint that I've been thinking about threading for a brake and then I will eventually use for a silencer when I'm out of this shitty state.

Can a varmint barrel be easily threaded? I assume I need a varmint brake because the diameter of the barrel is much greater.

What is a good common threading to use so I can have compatibility with many breaks and cans?

Thanks in advance

 

[TB2Blazer]

Re: Threading a .308

Not to hijack the thread or anything but I have an ar15 with a target barrel and I was wondering the same thing.

 

[Pflyinguy]

Re: Threading a .308

5/8 x 24 is fairly common for .30 cal although there are many others.

1/2 x 28 is typical for 5.56 semis.

Most gunsmiths can thread a barrel for around $100+

 

[biffj]

Re: Threading a .308

5/8-24 seems to be the most common size being used right now but bigger is always better. The Desert Tactical SRS uses 3/4-24 which is much better in my opinion. Whenever you cut material off a cold worked barrel remember that there may be some residual stresses in the steel. The less you take off the less you are likely to get swelling at the muzzle. The larger diameter thread is stronger as well. I thread all my .30 to .375 barrels 3/4-24 and the .50's like the 12.7 X 48 (510 whisper) is 7/8-24.
It would help to select the likely suppressor prior to threading as that will give you the thread you'll need. If you're having a suppressor made up special you can use any thread.

Frank

 

[Griffin4590]

Re: Threading a .308

what Biffj said.
As far as break sizing you can just give them the OD. of the barrel and they build you a break that fits perfectly

 

[Gman021]

Re: Threading a .308

Ok so the 3/4-24 is the way to go, and it doesn't matter that my barrel is a varmint barrel, either way by the end my threaded barrel will have the same diameter of a non-varmint barrel being threaded?

Does the 3/4-24 accept many types of muzzle brakes?

 

[biffj]

Re: Threading a .308

Not sure what you mean about the barrels being the same in the end....?
If you have a varmint barrel it means that you can use a larger thread more easily than those who have the pencil thin barrels. The varmints are usually about 7/8" or so at the muzzle. That makes a 3/4" thread easily doable. For those with a thinner barrel its not always possible to use a larger thread. The reason many are using the 5/8-24 thread is due the fact that a lot of guys want suppressors but they are shooting thin barrels that don't have a large enough diameter to create any bigger thread.
As for who makes muzzle brakes for the 3/4-24 thread I can't answer. I make stuff myself for small projects and personal firearms but no real production runs. Some of the larger makers out there probably offer a choice of sizes. If more people are looking for larger diameter muzzle accessories its a good bet that they will be available soon. Give them a call or send an email....sooner or later they'll be available if they're not already.

Frank

 

[Gman021]

Re: Threading a .308

I was trying to say that if a varmint barrel and a non varmint barrel are threaded with the same threads, will they be the same. Obviously a varmint barrel is thicker, so I didn't know if that mattered.

I'll look into muzzle brakes a pick one out and go from there.

 

[Killer Spade 13]

Re: Threading a .308

Get with RWS here on the Hide. See what the diameter of your barrel is about 5/8" back of the muzzle. If it's a Remington varmint barrel it'll probably be about .823".

Give him your information and he'll build you one for about $45 plus $5 shipping.

Here are a couple of pics of one of his brakes.

This is on my build.

 

[GGGN]

Re: Threading a .308

Most suppressor are 5/8 x24 on .308 and will serve you fine. the larger threads are not need unless running a larger caliber suppressed. I would get a standard thread. If you are going to get a suppressor later. Check the threads you will need for a future can and go with that.

 

[Boltfluter]

Re: Threading a .308

5/8x24 is definitely the way to go. Hope this helps. Paul.

www.boltfluting.com

 

[biffj]

Re: Threading a .308

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Gman021</div><div class="ubbcode-body">I was trying to say that if a varmint barrel and a non varmint barrel are threaded with the same threads, will they be the same. Obviously a varmint barrel is thicker, so I didn't know if that mattered. </div></div>

That makes sense. One thing you might consider, thread the barrel 3/4-24 and get an adapter for 5/8-24 if you buy a can that size. It prevents the possibility of the muzzle swelling from removing all that material and still allows you to use the smaller muzzle thread when needed.


Frank

 

[99v6red]

Re: Threading a .308

How much dose it cost to thread the barrel?

 

[SABuzzard]

Re: Threading a .308

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: GGN</div><div class="ubbcode-body">Most suppressor are 5/8 x24 on .308 and will serve you fine. the larger threads are not need unless running a larger caliber suppressed. I would get a standard thread. If you are going to get a suppressor later. Check the threads you will need for a future can and go with that. </div></div>

+1

No reason not to use the standard 30 cal thread pitch.

 

[Strangedays]

Re: Threading a .308

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: 99v6red</div><div class="ubbcode-body">How much dose it cost to thread the barrel? </div></div>
My gunsmith charges $55 to thread and install a brake another $18 for a thread protector if you plan on hunting with it.

 

[Gman021]

Re: Threading a .308

I appreciate all the help guys. I think Im going to go with a 5/8x24 and then talk to RWS about getting one of those brakes. They do look nice.

 

[Killer Spade 13]

Re: Threading a .308

Gman021,

Just so you know, RWS's are stainless steel and come in a natural metal state.

I used high temperature primer and paint to paint mine.

I roughed up the surface a wee bit with some 150 grit sandpaper, applied the primer coat and baked it at 400 degrees for and hour and then did the same thing with two coats of matte black.

 

[Gman021]

Re: Threading a .308

That is good to know. That brake does look good though and I plan on cerakoting my barrel so I it's fine.