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Muzzle Brake Issue on 338 Edge

 
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  #8  
Old 12-30-2010, 09:53 PM
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Re: Muzzle Brake Issue on 338 Edge

Cordell,
I am the one that sold Robert his rifle as you know. I had the inside of the brake opened up to the first port to let the gasses escape better. Initially, they were forming a carbon ring at the barrel/ brake junction, which told me there was back pressure being cuased. After having a local smith take a drill bit chucked in his lathe and opened up the inside of the brake to make the first chamber bigger to the first port opening,the problem was solved and as you know recoil is mild on that rifle.Since that time, I have seen these brakes installed so the crown is located flush with the first port opening, and that works great as well.
Where is the crown located in relation to the first port of the brake ?
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  #9  
Old 12-30-2010, 10:43 PM
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Re: Muzzle Brake Issue on 338 Edge

Trueblue,

That is a good question, I would have to look closer and take some measurments and see what I can learn.

I will see if I can take a picture of the brake that is good E-nuff to post and see if it is doing the same thing the other one was before it was worked on.
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"People sleep peaceably in their beds at night
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to do violence on their behalf." -- George Orwell --

Rest easy, sleep well my brothers.
Know the line has held, your job is done.
Rest easy, sleep well.
Others have taken up where you fell, the line has held.
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  #10  
Old 01-01-2011, 01:33 PM
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Re: Muzzle Brake Issue on 338 Edge

Ok After some thinking about what Trueblue said in this post and last time I spoke with him on the phone about this issue I think I am finally understanding what you meant.

Correct me if I am wrong, when you say open up the first port you are talking about where the end of the muzzle meets the brake. The opening up is done to the inside when installed on the barrel you can not see the port.

I was thinking the ports on the side that are visible when ever you look at the brake. This is starting to make sense, my Smith cut the "bullet channel" smaller than what the manufacture suggested. He said the smaller the hole the better the break works. This may be very true on the brakes he uses but not so with mine.

Trueblue you also got me thinking about the space between the muzzle and the brake when installed on the barrel. If there is a big enough gap back pressure will be the result.

Like I said I do not have much knowledge or experience with muzzle brakes. I think I have a better understanding of the little things that can make a difference.

True blue I took a pic of the brake where it meets the muzzle the first port you see, this is the one you are talking about opening up. Is that right?

__________________
"People sleep peaceably in their beds at night
only because rough men stand ready
to do violence on their behalf." -- George Orwell --

Rest easy, sleep well my brothers.
Know the line has held, your job is done.
Rest easy, sleep well.
Others have taken up where you fell, the line has held.
Peace, peace, and farewell... --Unknown--

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  #11  
Old 01-01-2011, 02:59 PM
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Re: Muzzle Brake Issue on 338 Edge

Yes. Just drill it bigger, but don't get into the threads. This should help, at least it did with mine. Only go to the first port opening.
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  #12  
Old 01-01-2011, 08:50 PM
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Re: Muzzle Brake Issue on 338 Edge

Yes I see also, I have used some of those brakes and I removed the first baffle which really only covers up the crown, and does nothing to reduce recoil.

I bore out my brakes to final dimension when they are installed on the barrel, for perfect concentricity. That baffle next to the crown did not seem logical, and could only cause problems when boring, if a boring bar got to close to the crown.
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  #13  
Old 01-02-2011, 01:13 PM
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Re: Muzzle Brake Issue on 338 Edge

Trueblue and Coyboy



I understand now. I just measured the hole in the last port/baffle, it is .0367 and I'd guess the first one is the same. With the first one being so close to the muzzle the back pressure is causing the kick. The gas is being forced through a small hole causing the equal and opposite reaction, the gas is being trapped in the first chamber and is not being allowed to escape fast enough. I am getting excited to get this done, then get the beast out to see if it has been tamed. I will have to look at the brake on my 300 RUM and see if it could be opened up to help reduce even more kick.

What size do i want the hole to be in the rest of the baffles? Mine is .0367 wich is very close the the maufacures recomended size of .0368 for a .338 bullet. I know the ports on my brothers are bigger than .0368. Also do you want the holes to be smoth? Mine looks as if they have been threaded or like a dirt road turned on its side and you can see all the washboard ruts.


Now I have another question, would this hole in the baffle being so small, slow the bullet down at all? As the bullet is traveling down the barrel it has to push the air out of its way. Will this also cause some back pressure slowing the bullet all be it a small amount say 1-15 fps or so? I wouldn’t think so, but as I stated before I don’t have much knowledge when it comes to brakes.
__________________
"People sleep peaceably in their beds at night
only because rough men stand ready
to do violence on their behalf." -- George Orwell --

Rest easy, sleep well my brothers.
Know the line has held, your job is done.
Rest easy, sleep well.
Others have taken up where you fell, the line has held.
Peace, peace, and farewell... --Unknown--


Last edited by Cordell; 01-02-2011 at 01:23 PM.
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  #14  
Old 01-02-2011, 07:51 PM
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Re: Muzzle Brake Issue on 338 Edge

if you look in the linked pic you can see that the threads on my brake run all the way to the first opening. So the crown will be visable on the barrel by looking thru the first opening of the brake.

Your first baffle on your style brake could be opened up to 1/2" and that would prevent the problem your having. The reamaning thru holes should stay at the dimension they currently are.

Take the the brake off and back to the smith have him chuck it up threads toward the tail stock and have him drill or bore out that first "blocking" baffle. any where up to thread minor dia.

http://www.centershotrifles.com/sale...e_100_1859.jpg
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