01-21-2015, 07:35 AM
You need to know the barometric pressure most importantly for the actual conditions you are shooting in. That will be a huge variable, more so than temperature even.
I have shot the 123gr A-MAX out to 1200yds with 14.4 Mils of elevation, but I was at 4400ft above sea level, in 80 degrees temp. There has been some second-guessing on the actual BC of the 123gr SST. Once we start getting beyond 600yds, it's better if we know the G7 drag modeling for that bullet. I'm not sure if we have settled on one yet for the 123gr SST.
I have shot the 123gr A-MAX out to 1200yds with 14.4 Mils of elevation, but I was at 4400ft above sea level, in 80 degrees temp. There has been some second-guessing on the actual BC of the 123gr SST. Once we start getting beyond 600yds, it's better if we know the G7 drag modeling for that bullet. I'm not sure if we have settled on one yet for the 123gr SST.
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