03-07-2016, 02:36 AM
I also looked at my drop data for 1000yds in the conditions we had, and reverse-calculated the numbers to see if the BC is correct for the 123gr AMAX.
If I use 2520fps for mv (which is right where I think I'm at with this load), with the barometric pressure we had, and the temps we had, looking at my real-world drop of 12 mils confirms the .468 G1 BC that I think is in JBM.
If anyone has JBM, they can maybe check and confirm. It's certainly not the advertised BC of .510 from Hornady. Even still, it's a great bullet that flies true for me, even at ELR from a short barrel, which is more than I ever expected for $27/100 heads.
If I use 2520fps for mv (which is right where I think I'm at with this load), with the barometric pressure we had, and the temps we had, looking at my real-world drop of 12 mils confirms the .468 G1 BC that I think is in JBM.
If anyone has JBM, they can maybe check and confirm. It's certainly not the advertised BC of .510 from Hornady. Even still, it's a great bullet that flies true for me, even at ELR from a short barrel, which is more than I ever expected for $27/100 heads.
NRA Basic, Pistol, Rifle, Shotgun, RSO
CCW, CQM, DM, Long Range Rifle Instructor
6.5 Grendel Reloading Handbooks & chamber brushes can be found here:
www.AR15buildbox.com
CCW, CQM, DM, Long Range Rifle Instructor
6.5 Grendel Reloading Handbooks & chamber brushes can be found here:
www.AR15buildbox.com