10-27-2015, 05:55 PM
You need to know:
* Optic height above bore
* Projectile weight
* Muzzle velocity
* BC
* Temperature
* Barometric pressure
When I zero at 6600ft elevation, then come down to 4400ft, the POI shift is pretty big. I just did that this past week, and the zero stop would't let me go low enough to compensate for the low POI at 4400ft.
50yd zeros normally print high at 100yds though, with your scope height and mv being the biggest factors in how high.
* Optic height above bore
* Projectile weight
* Muzzle velocity
* BC
* Temperature
* Barometric pressure
When I zero at 6600ft elevation, then come down to 4400ft, the POI shift is pretty big. I just did that this past week, and the zero stop would't let me go low enough to compensate for the low POI at 4400ft.
50yd zeros normally print high at 100yds though, with your scope height and mv being the biggest factors in how high.
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