1000 yd shooting

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How much? My guess is that it is a (small) percentage of the hoazontal drift.

Lets say a 10 mph nine oclock cross at 1200 yards with a RHT 1-10. How much spin drift with and with out the wind.
Can you calculate off of a program?

Lets throuw a number out there...lets say on a zero wind day that the above shot will give you 8" of drift to the right. The next shot is taken in the 10MPH cross. Will the 8 inches of hoazontal drift drop to ...say 5 inches and the other three inches ends up as drop?

You guys are freakin me out here!!

i'll get to it later(not at home right now) but bullet flight fte calculates for this. I have a chart i'll scan in and post when I get home.