FWIW with my Browning .30/06 a fairly minimal amount of tuning the BOSS got it to shooting five bullets through one ragged hole at 100 yards with my selected load. I made no other changes to the rifle beyond fitting a scope. I haven't changed either the settings or the load in the years since, and it still does just as well.
I only use the CR though. I have tried the ordinary BOSS on another rifle and it is very blasty - particularly if you are next to it while someone else is shooting. The CR on the other hand seems to reduce blast compared to a conventional barrel of the same length, if anything.
