In three rifles: Two .308W's with 150s and one 7mm-08 with 140's I've seen no appreciable difference, using identical powders and charge weights. Sometimes the NBTs win and others the Accubonds. All rifles hang around an inch +/- a little on average. Have shot them out to 300 with the same results.
One will shoot to a little different POI, but group size remains constant.
