Adjustable Muzzle Brake with out threads?

[mlmathis.308]

I was on Brownells (spelling) sweb it the other night and noticed that you can purchase an adjustable muzzle brake  that aparently slips over the muzzle according to you barrel size. Not alot of information on it on the site. I bet if I bought one and bores it .020 over the round I use(.308) that I could bust the heck out of my barrel LOL. Would purchasing one of this even be a reasonable thought?

Just wondering what your thoughts might be. :-)

Mike

[mlmathis.308]

:-D  I have one(De-resonator), But the range I shoot at is about 50 miles from where I live, so I havent had a chance to try it yet