I weight all my bullets before reloading, to get as close as possible to insure accuracy. When I was looking for a bullet to load for elk, I got a bunch of differant bullets to try, and while weighing them nosler was one of the worst for exact weight. As for the partition, I was hunting deer and shot one in the side, the bullet expoded and there was nothing left other then very small pieces throughout the deer. I was disgusted and have never used them since. It was about a 125 yd shot hitting it just behind the front leg.