I have a buddy who has been killing everything out here for the past 50yrs with 150 corlokt. His rifle is a Browning BLR (first run too) and he put a humongous Burris 3x10x50 on it ( he loves how it gathers light in the black timber) ha He has tried the 180 round nose, but felt it didn't open up that much, so went back to the 150. He usually uses factory but handloads too, but the 150 corlokt still. He has even shot plumb through a cow bison around 200yds.
