I took my first trip to the rifle range in years, today and boy was it fun. My .270 A-bolt ll CS, opened with a sub 3/4 inch group at 11 o'clock, high about 3 inches at 100 yards. Made an adjustment on my old 3x9x50 scope and went to 1 o'clock high about 3 inches about 1 1/4 inch group. Made adjustment in the Boss and scope, Bingo, 2 inches hugh at 12 o'clock. Sub 1 inch. Love this rifle.