Normally, i'll just add clicks all the way through. It may not be correct, but as you come closer the clicks make less difference anyway...
If you want to be clever shoot at 50yds and at 25 and measure in MOA and just blend between the two.
This is why i'm looking at the kestrel thing, because it seems in winter the trajectory is different. In SA, most saw a lift at 55, but nothing at 25... suggesting the pellets were flying flatter. In winter therefore it's not off the wall to think they're looping more to denser air... hence the Kestrel and looking into Density Altitude. SA was 4000ft + sea level. We've seen shifts 2500 ft below sea level. Little wonder the trajectory trend has been reversed.
BFTA/NSRA County Coach
CSFTA Chairman/BFTA Rep