I just loaded up some 128's in a .270 Sherman. As others stated, they seem to pressure sooner. I was only able to get 3200 in a .270 Sherman, that is doable with a 26"-28" standard .270.....however, per George's suggestion, I loaded @ .025" off, and then just loaded a few about a grain under max, which is 3185 fps, and shot a 6 shot group that could be covered with a penny. They may not get the velocity of others, but they sure do have the accuracy. Hopefully my cousin will test them on some northern California blacktail this fall and I can report terminal performance