Consistent Cast Bullet Weights

Tonight I weighed a sample of ten bullets from the batch I cast yesterday and plugged them into Excel to figure out the average weight and the standard deviation in weights.

Accurate Molds 43-215C Bullets
Bullets cast from 20:1 lead:tin alloy
Sample	Weight in Grains
1	219.6
2	219.4
3	219.0
4	219.0
5	219.2
6	220.2
7	219.6
8	219.1
9	219.4
10	219.1
	219.4	Average weight
	0.371782493	Standard deviation

According to Tom at Accurate Molds, this bullet should drop at about 215 grains when cast from wheel weight alloy. Since the 20:1 alloy I'm using lacks any antimony, they naturally weigh a little more.

Never let anyone tell you that homemade bullets won't be as good as factory-made.