PLEASE USE CAUTION!!!
I purchased this muzzle brake to have installed onto a Savage 110E long action chambered in 7mm Rem. Mag. After having it installed by a competent gunsmith I examined it very carefully to make sure it was installed correctly. Its bore was centered with the barrel's bore, and its muzzle hole was enlarged to .3125" to accommodate the 7mm bullet. After careful examination, and appearing to be in good order, I took it to the range for a few test shots. This is where things got really ugly. The first shot resulted in the vented frontal portion completely disintegrating; sending tiny pieces of stainless steel shrapnel in all directions perpendicular to, and in a concentric circle around the muzzle brake. The remaining rear portion that screws onto the barrel was blown off of the barrel's muzzle, stripping off the threads and shot downrange, never to be located despite extensive effort. Taking into consideration the manufacturer's claims and customer reviews of this product here at Brownell's, this product promised great results from an economically-friendly modification. However, this product not only failed to produce the expected results, it created an extremely dangerous situation for both shooter and bystander(s). Having gone to adequate, if not extensive, measures to ensure safe and proper installation, having this happen makes me extremely cautious about the safety of others. This was a [$] lesson that could have resulted in grievous bodily injury or death. Not only would I not recommend this to a friend, I would not recommend it to anyone else, for that matter.
DANGEROUS!!!!!
This product works great. BUT. The exit aperture is 5.5mm and not 6.0 mm. Why is this significant? Because in its as shipped condition it can NOT be used for a .22 caliber centerfire rifle. Unlike what the description says. I don't know if I got a "bad" one, or if the Brownell's description is just incorrect, either way it is dangerous. Other than that. It works great, with significantly less blast than something like a Miculek brake. Kindof a poor man's battle comp. I would Don