The 130 grain GMX wasn't super accurate in my .270 but the velocity was within about 20 fps of advertised (24" tube). The 140 grain SST is scary accurate in my rifle and consistently produces 1/2" groups, with velocity almost exactly as advertised. I don't think I ever did an actual average for velocities with the 140 grain SST because I was so impressed with the accuracy that I really didn't care. I do know that a few shots registered higher velocity than advertised with the 140s.
