Please pardon the less than legible format - I haven't figured out how to get AGN to accept HTML so math expressions can be formatted. To reduce eyestrain (to a merely agonizing level), click on the image, then zoom it.
Consider two shot strings: 700fps MV with 20fps ES versus 900fps with 40fps ES
- Thread starter Steve_in_NC
- Start date
Plugged into ChairGun (which I think you helped build) in the "drop from horizontal line" graph and showed that the drop for each 10fps is increasingly larger as the MV goes lower. Most who only shoot between 800-900fps and below 75 yards range would not notice a huge difference in drop, but at longer ranges like at 100 and more starts making a huge difference.
How much does the BC effect the drop? At 100 yards I plugged in a 0.7 BC pellet for 700/710fps and 900/910fps MV, and albeit the overall drop was much bigger for the 700fps MV the difference in 10fps/POI was very close (about 0.5in vs 0.75in), certainly not as much apart as with the low BC pellet. So is it fair to say that shooting a pellet at lower MV (like 700fps) but at a much higher BC can lead to negligible POI difference up to 100 yards?
How much does the BC effect the drop? At 100 yards I plugged in a 0.7 BC pellet for 700/710fps and 900/910fps MV, and albeit the overall drop was much bigger for the 700fps MV the difference in 10fps/POI was very close (about 0.5in vs 0.75in), certainly not as much apart as with the low BC pellet. So is it fair to say that shooting a pellet at lower MV (like 700fps) but at a much higher BC can lead to negligible POI difference up to 100 yards?
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An interesting thing happens as BC gets higher and higher. Eventually the projectile flies as though air didn't exist at all - as if it flew in a vacuum.
Then the R term simplifies to: -1737 Yards^2. But the cubic relationship between MV and the rate of change of drop with ES remains the same.
Then the R term simplifies to: -1737 Yards^2. But the cubic relationship between MV and the rate of change of drop with ES remains the same.
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Good question. The criterion above may be helpful in deciding when a tune is approaching an optimum MV by putting MV variation - ES or STD - into perspective when just looking at shot string plots might suggest a different conclusion. For example, the three strings below...
...work out almost exactly the same according to the STD / MV^3 accuracy criterion, all rounding off to 2E-08.
...work out almost exactly the same according to the STD / MV^3 accuracy criterion, all rounding off to 2E-08.
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