I told the program "zero at 75yds" and it shows it low before 20yds, .1" high at 20, up to 1.5" high at 45 & 50, then back down to zero at 75yds. Telling it 20yds gave a slightly different trajectory.
According to
this thread .45 Super out of a Marlin carbine is 1260fps with a 230gr JHP. Assuming the same BC as the HydraShok this gives:
25yd zero - crosses at 25/80, mid-range +1.1" @50-55, 2.2" low at 100yds
50yd zero - peaks at 50, .5" low at 25, 4.3" low at 100
75yd zero - crosses at ~25/75, mid-range +.8" @50-55, 2.7" low at 100yds
100yd zero - crosses at 20/100, mid-range +2.3" @60-65, 4.1" low at 125yds
If you use the
Point Blank Range calculator and a vital radius of 5" (allowing up to 5" high or low) then it says:
.45 Super (MV=1260, BC=.142) -> Max PBR = 151yds, zero at 128yds
.45 ACP (MV=1020, BC=.142) -> Max PBR = 133yds, zero at 112yds
.45 ACP (MV=850, BC=.142) -> Max PBR = 114yds, zero at 95yds
That allows shots to go as much a 5" high at the middle ranges. Shorter zeros drop that mid range down a bit at the expense of being much lower at the longer ranges. If you close up the vital zone to 3" high or low that drops PBR range down to:
1260fps -> 126yds, zero at 108yds
1020fps -> 109yds, zero at 92yds
850fps -> 93yds, zero at 79yds