I have to agree with Steve on performance levels between the 7mm and 6.5mm"s.
To answer the question at hand, I have used the 120 BT's quite a bit in several different 6.5's with excellent results, both on paper and game. Most of my experience has been with the 6.5-06. With several different barrels, in lengths of 24 and 26 inches, the 120's have made tiny groups at the range on a regular basis. I have shot deer and antelope with them from 50 to several hundred yards with the same end result... a dead critter. I have been thinking about switching to the 125 partition in the 6.5-06 off and on over the years, but have hesitated due to the performance of the 120's. They are a great bullet in the 6.5's as far as I am concerned.
