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98 Custom - 2006
By Bill Mills - Photos By Dawn Mills - July 2006
Velocity comparison between 1bps and
Understanding the Summary Data
High: This represents the highest velocity in the recorded string of shots.
Low: This represents the lowest velocity in the recorded string of shots.
E.S.: Extreme Spread - this is the difference in velocity between the highest velocity shot and the lowest velocity shot.
Ave: Average - this is the average velocity of the string of shots. This is the number to look at to compare whether velocity is increased overall, or decreased overall by a change in a variable.
S.D.: Standard Deviation - S.D. Is a mathematicall way of expressing how close most of the shots are to the average. The lower the Standard Deviation is, the more consistent the velocity is.
95%: This is an easier
to understand way of expressing consistency. Statistically, there
is a 95% chance than a given shot will vary this amount or less from the
Sound level readings taken with stock barrel, hand fired on test stand. Readings taken 10 feet from muzzle, approximately 45 degrees off-axis from the direction of fire (45 degrees to the right of the aim-point.)
20 shot target strings fired at 1bps,
Freak Barrel - All American Tip, 0.687
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