I worked with family and friend's rifles in (2) BAR 7 Mags, (1)270, and (2) 30/06, and one Browing A Bolt in 7 Mag that all had BOSS's on them.
I dialed in these rifles to shoot 1/2" or less, every one of them.
If you don't like the ports, then use the CRS unit with no holes in it like others have said.
