If a person does not like the muzzle blast from the BOSS ,Browning makes a blank replacement with out holes for the BOSS unit . I have a Browning Varmint 223 Rem which was one of the most accurate out the box rifles I have. A Ruger 77 Target Gray 204 Ruger was also a 1/2 inch shooter at 100 Yds. The rifle that took the most work to get it to shoot under one inch at 100 Yd groups is a Rem 700 LS 221 Rem rifle. I glass bedded the action,free floated the barrel ,adjusted the trigger pull down from about 6 lb to 3 lb and had a gunsmith lapp the bolt locking lugs. I should have had the muzzle recrowned by the gunsmith when he had it. I also have a old Rem 700 25-06 Rem that would shoot pore groups, then I noticed that only one locking lug was contacting the action. I had a gunsmith lap the bolt locking lugs, the rifle now shoots under one inch groups at 100 Yds. One the other hand I inspected and shot an old Rem bolt action 222 Rem rifle last year that was purchased when the 222 Rem round first came out. The owner carried that rifle in his pickup over the years and had lost track how much he had shot it ,but it was a bunch. I pulled the barreled action out of the stock ,cleaned the barrel ,action and stock. Put the rifle back together went out to the range and shot a 3/4 inch 5 shot 100 Yd group off the bench rest. Good luck with what ever you get.
