If your lead is not 100% pure, you could see slight weight variances. Harder lead is lighter, and slightly larger as it comes from the mould.
Drop a chunk of your lead on a concrete floor. The pure lead will make a dull thud, hard lead will ring.
If you're casting minies with a manually operated base plug, makes sure the plug is seated all the way into the mould. A slight amount of in/out movement could cause your weight differences.
Not sure how much the weight difference will affect performance in an offhand match, but we all chase consistency.
Bob Anderson
Ordnance Sergeant
Company C, 1st Michigan Volunteer Infantry
Small Arms Committee
"I won't be wronged. I won't be insulted. I won't be laid a hand on.
I don't do these things to other people, and I require the same from them."
- John Wayne in "The Shootist", 1976
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