I suspect the reason for the 95 in the Partition has to do with some rifles, a 6mm I owned was one example, which don't like the length of the 100-105 spitzers. My rifle only seemed to be able to stabilize the 100 Sierra SMP Pro-hunter in that weight. By using a 95 Partition I could get useful accuracy. I never did try the 100 PT based on the fact that cup and cores of the same weight just would stay in a cluster.
