Muzzle brake

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by catch-34, Jun 23, 2013.

  1. catch-34

    catch-34 Well-Known Member

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    I just had a mini mag muscle brake installed on my 7mm rem mag. The question I have is I'm going to have to do load development again or if the recipe I have been using will shoot the same?
     
  2. varmintH8R

    varmintH8R Well-Known Member

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    That's a great question. I would guess it will shoot very similar. Shoot a box of your proven load through it and compare it to before. If the results are similar, I wouldn't mess with it.
     

  3. aroshtr

    aroshtr Well-Known Member

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    It really shouldn't effect it too much. You will most likely have to re-zero. Also you may find it could shoot better groups. It all depends on how true your crown was originally. The smith that installed you brake should have trued that up during the process of threading the barrel. In several cases I have seen factory rifles shoot better with a brake installed.
     
  4. J E Custom

    J E Custom Well-Known Member

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    A well installed brake should not hurt accuracy. It may change the harmonics and move the POI.

    If it does some adjustments to your pet load may be necessary. (In most cases a few 10ths of a
    grain + or - will do it.

    Rarely will you have to abandon the load entirely.

    If the brake is not installed properly allowing the bullet to strike the brake (It happens more often than you think)it can wreak havoc on accuracy.

    J E CUSTOM
     
  5. Bart B

    Bart B Well-Known Member

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    Adding a muzzle break will defininetly change the resonant frequency of the barreled action, and therefore the harmonic frequency multiples thereof. It'll whip at a lower frequency with the weight on its muzzle. And that means bullets will leave at a different place in the muzzle's whip cycle.

    Ideally, all the bullets should leave a little before the muzzle axis reaches its top; faster ones sooner than slower ones. If they leave a lot sooner, the only thing you may see is a bit more vertical shot stringing as the axis is changing its angle fastest at mid point in its swing arc.

    We don't know where in your barrel's cycle bullets leave at. So, just shoot the darned thing and see what happens.
     
  6. TOM H

    TOM H Well-Known Member

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    Good advise
     
  7. catch-34

    catch-34 Well-Known Member

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    Thanks for the replies. Hopefully ill be able to get out this weekend and shoot.
     
  8. Doublezranch

    Doublezranch Well-Known Member

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    J E Custom is exactly right!!!

    I just had this same issue. I put on one of Steve Pratts titanium breaks on my 300 Ultra. I did find once I recieved the rifle back that the harmonics had changed. I made 3 shot groups from my original 84.8 to 84.4 respectively. Whouldn't ya know it, the gun shoots much better and the groups are way tighter (.25 @ 100) with a 84.4 grain powder charge. Now the gun shoots better than it did without the break. 4 thenths of a change made a dramatic difference. A part of me didn't want it to work out, I was dreaming of a new Brux barrel!! LOL!!