Just got back from testing my new digital scale (Dillion). I weighed 31 bullets that I had cast earlier this year. These bullets had already had the obvious culls removed and then had been lubed, sized and gas checked.
The mold was a LBT 44cal 280g.
The average weight was 288.59g
The weight ranged from 285.7 to 290.6 or 3.6g (1%+?)
Average deviation was .74 (What ever the hell that is, it has been 20 years since I did this in college)
Standard Deviation was .98 (Ditto)
If I throw out the lightest and heaviest, the numbers change to
Average weight = 288.62g
Range = 287.0g to 290.3g or 3.3g
Average deviation = .62
Standard deviation = .76
So my question is, How am I doing? Is my sample to small? Should I give up casting and stick to buying bullets (note that I also weighed some store bought cast lead bullets, only a few but the spread seemed about the same)? A three and a half g spread seems high but these are 290g bullets (close enough). I honestly dont know if this is good or not.
Comments?
Grendel