Author Topic: 7mm BR (Read 809 times)

bowhunterrt2 · « **on:** October 21, 2004, 04:34:16 AM »

Hi Ive been thinking about buying a7mm BR 15in barrel with a fox ridge muzzle break That makes it 16 1/4 in long. Am i going to be legal to put it on a rifle stock? An is the muzzle blast going to be severe. I had a 22-250 20in barrel with a break from fred at bullberry. I had him take it off to loud to hunt with. Thanks for any imput Joe

22hornet · « **Reply #1 on:** October 21, 2004, 07:17:35 AM »

Yes you would be legal as a carbine but with any muzzle brake or compensator your muzzle blast is going to increase.

jhalcott · « **Reply #2 on:** October 21, 2004, 08:36:50 AM »

The muzzle breakMUST be permanently attached to the barrel (welded) or a part of the barrel to be legal to use with a shoulder stock.

Lone Star · « **Reply #3 on:** October 21, 2004, 08:55:55 AM »

jhalcott is correct, the 15" Encore barrel will be illegal with a rifle stock. The T/C Muzzle-Tamer is screwed onto the barrel and is not considered part of the barrel by the BATF.

22hornet · « **Reply #4 on:** October 21, 2004, 10:13:14 AM »

I guess I stand corrected...

bowhunterrt2 · « **Reply #5 on:** October 21, 2004, 11:01:36 AM »

Thanks for the info. every one have a nice day every day

Jay HHI6818 · « **Reply #6 on:** October 21, 2004, 03:22:46 PM »

It will be louder with the brake. If your concerned about being louder don't get the brake. You really don't need it on a 7 BR.
I shoot an XP100 chamber in 7BR, that I shoot IHMSA silhouette with. I have fired some 80 shot matches and recoil is not a problem.

jhalcott · « **Reply #7 on:** October 22, 2004, 07:56:36 AM »

I am curios as to why you want a brake on a 7BR. This round isn't a kicker.It is very accurate and mild.If you want a carbine barrel It would be better to get one about 20"/22" long.The powder will be completely utilized in this length barrel and a stubby fat barrel is much stiffer than a longer thinner one.A brake will only make the thing seem louder to the shooter and those around you.

bowhunterrt2 · « **Reply #8 on:** October 22, 2004, 01:37:40 PM »

Hi jhalcott The barrel all ready had the break on it . I just thought it would be nice an light to carry deer hunting some times i go a little to deep.

jhalcott · « **Reply #9 on:** October 22, 2004, 02:55:08 PM »

Just a passing thought! Some years ago I broke my right elbow.I didn't want to pass up deer season so I had a cousin AFRO-ENGINEER a stock from a 30 carbine paratrooper.The wire type.It was attached to a leather wrist strap and I could swing it up against my shoulder when I wanted to shoot.It took most of the pressure of my healing elbow and helped accuracy a lot.It should be legal as it is NOT part of the gun.I had to rig up a hook to keep it from flopping around as I walked. BTW, that gun will be loud with a muzzle brake.

SLAVAGE · « **Reply #10 on:** October 22, 2004, 05:15:22 PM »

cant you just have the brake added to the barrel an not have it drilled with holes like an added on part as long as it is connected wouldent that work?

Lone Star · « **Reply #11 on:** October 23, 2004, 03:01:06 AM »

If you mean add a solid barrel extension, it would be legal ONLY if welded onto the barrel. BATF is pretty clear on this.

If brake noise is a problem you can wrap the brake with shim stock and wrap that with electrical or 100mph tape. Wouldn't look too cool but it would block the holes and eliminate the radial dispersion of the sound.

tnwill · « **Reply #12 on:** October 23, 2004, 11:42:25 AM »

T/C factory breaks are not threaded onto the barrel. They are silver soldered on.

Lone Star · « **Reply #13 on:** October 24, 2004, 10:06:58 AM »

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T/C factory breaks are not threaded onto the barrel. They are silver soldered on.

Not according to T/C they aren't. Go here and read the facts:
http://www.foxridgeoutfitters.com/productpdfs/ACF5630.pdf

tnwill · « **Reply #14 on:** October 24, 2004, 02:07:32 PM »

A few years back, a local shooter had a factory Hunter barrel that upon firing blowed the brake off and was never found. The barrel had not been threaded. The barrel was sent back to T/C and a new brake was installed. Thompson may have changed their policy since.

Lone Star · « **Reply #15 on:** October 24, 2004, 04:09:55 PM »

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Thompson may have changed their policy since.

They most certainly have changed to threaded brakes - and a good thing too, considering your "friend's" experience! I don't think the BATF would consider silver soldering as a permanent method to attach a brake to a barrel either. :roll: I do not know of an aftermarket brake maker who doesn't thread the barrel; Mag-Na-Port doesn't count of course. :wink:

Keith L · « **Reply #16 on:** October 25, 2004, 12:41:08 AM »

If the barrel temp is less than the melting point of the silver solder a well soldered brake would be as strong as the threaded brake. Silver solder is quite strong when the mating surfaces are well prepared and the solder thickness is small.

I have never had a brake on any barrel, but I was told at one point the T/C brakes were glued in place. That joint is even more prone to failure if not done well. But the proper choice of glue and careful application could make for a permanant joint as well.

I would think that any connection that required methods not available in the field would count for the ATF. Any barrel can become to short if you have a saw or a torch.

poule d'eau · « **Reply #17 on:** October 25, 2004, 07:59:55 AM »

Quote from: Lone Star

Quote
Thompson may have changed their policy since.

They most certainly have changed to threaded brakes - and a good thing too, considering your "friend's" experience!

Hate to rain on your parade here but I would put my money on the silver solder.
I just looked at a barrel from TC's "custom" :roll: shop with a brake. This one was brand new in the box, just delivered. It looked exactly like the ones I have had and all of the ones I have seen prior to this one. I have had 2 of their brakes and will have no more, one came off and the other was trying too.
So if they have for SURE changed their ways I would like to know.
jeff

Lone Star · « **Reply #18 on:** October 26, 2004, 04:58:31 PM »

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Hate to rain on your parade here but I would put my money on the silver solder.

I'll be very happy to take your money, thanks! Had you bothered to follow the link I posted above, you'd see that it is very clear that T/C use threaded brakes. My 2-year old .45-70 carbine barrel's brake is threaded - the threads are plainly visible on the inside of the brake itself. There is NO DOUBT that T/C uses threaded brakes.....

BTW, the BAFT rules require a 'permanent method' of barrel extension attachment. "Glue" can be very strong - cylinder sleeve retaining compound is plenty strong enough for a standard type brake and is good to over 400F. But neither it nor solder is truely permanent. Welding is. And whatever you and I think becomes immaterial in a courtroom facing a BATF attourney.... :wink: