6mm Muzzle Brake

Iron Worker

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Apr 3, 2004
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2,146
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Reno Nevada
I have a Vias Muzzle brake that I had a heavy bbl 6mm. The bore on the brake measures .250 . Can I use this on same diameter heavy bbl but .224 instead of 6mm ?
 

J E Custom

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Jul 29, 2004
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10,317
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Texas
The bore diameter in the muzzle brake for a 6mm should be ..264

.250 is two tight. the bore diameter is only .014 thousandths larger than the bullet. Any error in alignment could easily cause bullet strike, ruining accuracy.

It is best to bore the brake on a lathe, but if you already have a .250 bore in the brake you can drill it out if you are careful to get it aligned.
If you decide to drill it, I would recommend a .270 bore for clearance error of the drill bit walking off center.

.020 Is the recommended clearance but .025 will be safer and nor take away from the brakes efficiency.

If you have a smith install it, have him bore it on his lathe to the proper diameter.

J E CUSTOM
 

Iron Worker

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Joined
Apr 3, 2004
Messages
2,146
Location
Reno Nevada
J E custom thanks for response. My question was can I use this break(Formerly on a 6mm bored rifle) on .224 bore
 

EddieHarren

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Nov 27, 2005
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1,142
Location
Maryland
Various Brake manufacturers have varying specs for the bore size of their brakes. Little Bastard Gen II FB brakes call for .030" over bore size.
 

J E Custom

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Joined
Jul 29, 2004
Messages
10,317
Location
Texas
J E custom thanks for response. My question was can I use this break(Formerly on a 6mm bored rifle) on .224 bore

Yes.
If you put it on a .224 you should have .027 thousandths clearance (.007 more than the recommended minimum of .020)

J E CUSTOM
 

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