Does adding a muzzle break affect accuracy?

[TheDeicide]

I am about to purchase a 300 RUM, although I am not yet sure on the model. I was looking at the Remington Sendero, Browning A-Bolt, and Browning X-bolt. If I buy one without a break, would having one put on mess up my accuracy. I've read that changing the harmonics of a barrel can be good or bad for accuracy.

[Broz]

No, in most cases they improve accuracy due to less recoil. I just shot a 2" three shot group at 720 yards today with a brake on.

Jeff

[rdsewell]

I agree with Broz less recoil better accuracy .

[royinidaho]

What Broz said!

[SidecarFlip]

.....plus less shoulder pain from magnum cartridges.

.....additionally more money in your wallet from less visits to the chiropractor.

[TheDeicide]

Guess I just came up with another question. Does it affect velocity? I was recently told the add on does not, but the ported barrels do. Any truth?

[Broz]

The only reason I could go with that would be, If you are taking a 26" barrel and adding a brake you are adding length to the rifle and not sacrificing any functional barrel length. If you do 2" of porting to the existing 26" barrel you are releasing the gasses and pressure at 24" so you have lost some functional barrel length. But I don't think the brake it self does anything to cause loss of velocity.

Jeff