Given a constant temp and just using a .277" 130gr SST with a MV of 3250 the difference in drop at 500yds. from sea level to 5000ft is -1.7", at 10,000ft it is -4.2", at 15,000ft it is -5.6".


The Chosin Few November to December 1950, Korea.
I'm not one of the Chosin Few but no more remarkable group of Americans ever existed.