Does anyone have any experience with Harrell precisiosns muzzle brakes? My buddy is a gunsmith and deals through them for brakes and such mainly on 6mm brakes and smaller calibers. My new 338 rum is not very confeortable to shoot gun) lightbulb so he told me he could put one of their tactical brakes on. I am slightly concerned as to how good these brakes work because they retail for 45 dollars. Any input would be great thanks