Unfortunately the variation you found is not unusual in retail bullets. I routinely find up to 4 grains variation in a box of 100 round balls from both Hornady and Speer.
I have two suggestions:
1) set your scale to 1 grain less than the heaviest ball in the batch. Weigh every ball and keep those that equal or exceed that weight. You don't have to be precise as this is just a pass/fail test - they're either heavier or not. Discard or keep the light ones for plinking. You may only end up with 20-25 balls but it's enough to sight in and hunt for a few days.
2) get a mold and start casting. I've little confidence in any retail large batch round balls. And you can at least melt and recast the discards from suggestion no. 1.
Last edited by mykeal; July 13, 2008 at 06:03 AM.
Reason: Spelling. Or is it speling?