Threading .284 caliber with 1/2×28???

[CrankyYankee]

I've always heard the typical rule of thumb is that only 22 caliber and below should have the muzzle threaded 1/2×28. I've also recently started seeing that rule of thumb stretched to .264 and below for 1/2×28. Read where 1/2×28 isn't recommended for 30 caliber because the wall becomes too thin. Several smith's I talked to said they prefer at least .010 in the wall. I understand all of that.

My question comes to .284 caliber. Specifically 7mm-08 at the 21" length at the muzzle. It would still give me .012 in the wall. I know Fierce and some other manufacturers sell rifles in 7mm Mag and are threaded 1/2×28 with a muzzle brake, but mine would be for a lower pressure cartridge, with a suppressor.

Any experience with or reasons why it's not safe to do so??

Thanks

 

[jraulsten]

I have a 300 WSM threaded 1/2x28 with no issues and it shoots lights out. Talk to the guys at APA Precision.

 

[coyote wacker]

Have a Kimber factory threaded for a 308 Win. 7/16"-28....really not what I would put on it for threads....
I have a lathe and install my own threads for suppressors....did a Winchester 70 243 Win. and put 5/8"-24 then added a larger shoulder as a stop like bell shaped so the larger threads could be used....

It is OK to use smaller than the norm for suppressors you just need to be more careful or have a bell added to give a larger shoulder....

Look at a Ruger American 450 Bushmaster with a 16" barrel they put the best idea on a barrel to put a suppresser on a bell end....all manufactures should use this idea with a brake they look OK....

 

[CrankyYankee]

Thanks Yote Wacker. I have enough shoulder per the suppressor manufacturer specs. I'm currently threaded at 9/16 for a brake and would like to have that cut off and rethreaded to 1/2 so I can use my direct mount suppressor. Just wasn't sure from a safety/pressure aspect.

 

[akmtnhnt]

Thanks Yote Wacker. I have enough shoulder per the suppressor manufacturer specs. I'm currently threaded at 9/16 for a brake and would like to have that cut off and rethreaded to 1/2 so I can use my direct mount suppressor. Just wasn't sure from a safety/pressure aspect.

Just get a 9/16 direct mount.

 

[CrankyYankee]

akmtnhnt.... my options are a direct thread 1/2×28 5" suppressor, or a brake attached heavier 9" suppressor which is the current set up. I'm trying to slim down and lighten up what hangs off the front of the barrel.

 

[WildRose]

I've always heard the typical rule of thumb is that only 22 caliber and below should have the muzzle threaded 1/2×28. I've also recently started seeing that rule of thumb stretched to .264 and below for 1/2×28. Read where 1/2×28 isn't recommended for 30 caliber because the wall becomes too thin. Several smith's I talked to said they prefer at least .010 in the wall. I understand all of that.

My question comes to .284 caliber. Specifically 7mm-08 at the 21" length at the muzzle. It would still give me .012 in the wall. I know Fierce and some other manufacturers sell rifles in 7mm Mag and are threaded 1/2×28 with a muzzle brake, but mine would be for a lower pressure cartridge, with a suppressor.

Any experience with or reasons why it's not safe to do so??

Thanks

My factory Rem 700 STW was threaded 1/2x28. It's still going.

Personally I'd prefer to have a barrel with enough meat on it to go larger but it doesn't seem to be a problem.

 

[FEENIX]

I've always heard the typical rule of thumb is that only 22 caliber and below should have the muzzle threaded 1/2×28. I've also recently started seeing that rule of thumb stretched to .264 and below for 1/2×28. Read where 1/2×28 isn't recommended for 30 caliber because the wall becomes too thin. Several smith's I talked to said they prefer at least .010 in the wall. I understand all of that.

My question comes to .284 caliber. Specifically 7mm-08 at the 21" length at the muzzle. It would still give me .012 in the wall. I know Fierce and some other manufacturers sell rifles in 7mm Mag and are threaded 1/2×28 with a muzzle brake, but mine would be for a lower pressure cartridge, with a suppressor.

Any experience with or reasons why it's not safe to do so??

Thanks

It depends on your muzzle OD.

I have a .257 WBY with .740" at the muzzle with 5/8-24" thread (MBM self-timing beast brake) ...

.264 WM with .750" at the muzzle with 5/8-24" thread (MBM self-timing beast brake) ...

7MM SAUM with .580" at the muzzle with 1/2-28" thread (MBM mini beast brake) ...

.30 Gibbs with .560" at the muzzle with 1/2-28" thread (Ross Schuler brake)

 

[K.E.C.]

It depends on your muzzle OD.

I have a .257 WBY with .740" at the muzzle with 5/8-24" thread (MBM self-timing beast brake) ...
View attachment 401923

.264 WM with .750" at the muzzle with 5/8-24" thread (MBM self-timing beast brake) ...
View attachment 401921

7MM SAUM with .580" at the muzzle with 1/2-28" thread (MBM mini beast brake) ...
View attachment 401911
.30 Gibbs with .560" at the muzzle with 1/2-28" thread (Ross Schuler brake)
View attachment 401910

Howdy, 2 of my Weatherby have 1/2 × 28 240 and 257. 2 of my Christian arms Mesa in 7.08 and 6/5 creedmore have that threading also. Works just fine. Hope this helps.

 

[CrankyYankee]

Muzzle OD is .67 at 21" so shouldn't be a problem.

Thanks all.

 

[K.E.C.]

Howdy, 2 of my Weatherby have 1/2 × 28 240 and 257. 2 of my Christian arms Mesa in 7.08 and 6/5 creedmore have that threading also. Works just fine. Hope this helps.

Oops I forgot my 6/5-300 is 1/2×28 aswell. It's all about your barrel dia. Not caliber .

 

[FEENIX]

Howdy, 2 of my Weatherby have 1/2 × 28 240 and 257. 2 of my Christian arms Mesa in 7.08 and 6/5 creedmore have that threading also. Works just fine. Hope this helps.

I am not sure if you meant to quote me or the OP.

 

[FEENIX]

Muzzle OD is .67 at 21" so shouldn't be a problem.

Thanks all.

Yes, you should be fine.

 

[K.E.C.]

I am not sure if you meant to quote me or the OP.

Just sharing some of what I have. That's all. Happy hunting.