Me and my friend are getting into the long range game and we are in the process of getting loads worked up for our weapons. My friend is using Hornady 7mm 139gr SSTs in his 7mag and they are shooting pretty good at 100yds. one thing we have noticed though is that when we weighed the bullets out of curiousity, we discovered that they are all not exactly 139gr. they vary from 138.9gr to 139.7gr. We did the same thing to a box of Sierra 7mm 150gr MKs and discovered that they ranged in weights from 149.9gr to 150.1gr. Much more close than the Hornadys. I understand that at a couple of hundered yards, the various bullet weights in the SSTs propbably are not going to make make a difference. But what will happen at several hundered yards with the SSTs? Will these different weights make a difference in POI?