I had QuickTarget and JBM Balistics do some simply trajectory calculation for me with my 30-40 Krag using an NOE 311-202-RN at 1760 fps (chronographed)…
QT says +2.3” at 50 yards for a 150 yard zero. JBM says +2.1” at 50 yards. These numbers are basically the same…
Yet, when I actually shoot at 150 yards with the impact of ~2.3” high at 50 yards, I am about +2.5” at 150 yards…
Both programs say I should be zeroed at 150 yards…
I wonder what happens since both programs predict virtually the same, but actual bullet path is much different…
Thanks…BCB