How important is exact science with your 10 short?

[OH Osthaus]

i try to stay very close- i also find it is not unusual for a bushing to throw something different from the chart

part of the reason is the operator and/or the press- if you tend to hit the bar hard to move it you will get a different charge than the guy who gently slides it from side to side.

i try to be consistent with the movement - and I several throws to get an average of the measurement

if there is more than a slight (tenth or so of a grain ) difference i can modify the bushing by adding a little tape inside or a light filing and polishing