d-a, 200 yds was just more practical. I could get away with testing so many different bullets with only one spotter shot for each before letting three fly at 200, I would have had to be much more careful at a longer range without a shield. I figure 200 is far enough to give accurate data for what the bullets are starting at. And I was pressed for time--that's a lot of walking.... Obviously though the farther you do it the better.
edge, I haven't shot the two side-by-side at the same velocity at distance. That would be interesting though since it looks like they start about the same but the 240 is supposed
to remain pretty constant while the 210 is supposed
to go down with velocity a fair amount.
At this velocity the 210 clearly has a much, much better form factor which isn't surprizing just looking at the two and the 240 makes up for it with the extra weight/SD. I was really hoping the 240 would measure higher from the 1:9 twist at the higher velocity, but it was within .004 of what I measured it at last year at a slower velocity from a 1:10 twist. Bummer. On the bright side it shows how much room for improvement there is...get a form factor similar to the 210 in a much heavier bullet and it'll blow them both away. Hopefully that will happen soon. [img]/ubbthreads/images/graemlins/laugh.gif[/img]
jmden, I used the Quicktarget program that comes with Quickload. You can do the same thing on JBM's Page
. I believe those are Metro, divide by 1.018 to get ICAO. I figured I'd list both for the hell of it, hopefully that didn't confuse too many people. [img]/ubbthreads/images/graemlins/laugh.gif[/img] They're just two different set of "Standard Conditions" that you should use as in ballistics calculations. ICAO is 29.92 pressure, 59 degrees F, 0% Humidity while Metro is 29.53, 59 degrees and 78%. There isn't much difference, Sierra uses Metro, Nosler uses ICAO, etc. So if you were using Sierra's Infinity program you'd want to use the Metro numbers because that's what it expects you to use....
Roy, that's an IOR 4-14X50 Tactical with the MP-8. The AccuBond had a scratch I didn't notice until I looked at the picture...dropped it on the floor. [img]/ubbthreads/images/graemlins/wink.gif[/img] Those weren't the ones I used for the test.