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Old April 7, 2013, 11:34 AM   #8
Senior Member
Join Date: March 2, 2013
Posts: 131
The bullet velocity will only be averaged over the distance used to measure the peaks, so the velocity won't drop that much if the distance is minimized. and the BC won't be that important. For slower bullets, you can move the measuring distance in to decrease the interval, especially if you have low ambient noise and few nearby sources of echoes from the initial report. For faster bullets, you would need the 150' just to distinguish the target hit from the report, but still, you could probably assume that a 10% error in the BC isn't going to produce a huge error in the calculated MV. I guess it could depend on your definition of huge. I have slow and fast rounds to play with.
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