RE: BOSS?
I have it on Win Model 70 in .270 and love it. Yes its loud, but I wear ear plugs. Using my handloads of IMR 4895 45 grs, 130 gr Nosler Ballistic tips, Boss setting of 1.4, I shoot under .60" groups at 100yds and just a little over 1" at 200 yds. If I set the Boss at .8 my groups open up to 1.1" at 100 yds.
Just my opinion good luck with any way you go.