02-21-2020, 01:37 AM
BobinNC Wrote:Running a JBM Trajectory Calculation on the 123 grain SST:
@2400 FPS it drops below a 2000 FPS expansion threshold at 275 yds.
@2450 FPS it drops below a 2000 FPS expansion threshold at 250 yds.
Here you can run simulations yourself:
http://www.jbmballistics.com/cgi-bin/jbm...mp-5.1.cgi
BobinNC I think you got your yardage figures in the wrong place. That are the ballistic app used gave you the wrong figures.

