The neat thing about this method is you can take the down range velocities all the way out to your longest range and compare them with the down range velocities of other rounds, calibers and see the changes compared to each other. The 45 long Colt at 100 yards has slowed to 1600 FPS and the killing level has dropped to almost KS of 63 from 79. Where the 30-30 load has dropped to 1930FPS to a KS 46 from 53.4.....that should make a few yell ‘foul...can’t be’, but it is! And from my use of these 45 loads in the field for years on large game....I can tell you it is.....! As many gunwriters have stated over the years, a 44 mag or heavy loaded 45 long Colt fired from a rifle is more powerful than a 30-30 at 100 yards....actually they are more powerful than the great 30-30, at a lot further than 100 yards.....