I'm in the process of setting up my rifle finally after some delay. I'm running a 7 PRC and opting to go with the Barnes 160 LRX factory loading out of personal preference. I was running a ballistic comparison between the roughly 5,000' elevation difference between where I live and where I hunt, and was wondering If I should use the drop chart for the higher elevation? An example being that if i set both charts to 200-yard zeros, the 100-yard impact would on the lower elevation is 1.41 inches - 0.39 mils, and the higher elevation is 1.31 inches - 0.36 mils.
My impact at 500 yard shows a 1.6-inch delta between the two, with the higher elevation with less drop even with factoring in a much lower assumed temp and humidity. As I don't live readily near a place I could shoot at that elevation to practice, would setting my zero down at low elevation to the assumed zero at high elevation work? That would have me hitting slightly low at 200 at the lower elevation when practicing right?
I also assumed a slight MV increase of 50 fps with the higher elevation, basing the 3000 FPS off the box 3050 FPS and my barrel being 22 inch and not the standard 24. Here is the link to the chart.
(I meant to add I doubt the small margin of difference at 100 will be distinguishable within any rifles cone of accuracy)
shooterscalculator.com
My impact at 500 yard shows a 1.6-inch delta between the two, with the higher elevation with less drop even with factoring in a much lower assumed temp and humidity. As I don't live readily near a place I could shoot at that elevation to practice, would setting my zero down at low elevation to the assumed zero at high elevation work? That would have me hitting slightly low at 200 at the lower elevation when practicing right?
I also assumed a slight MV increase of 50 fps with the higher elevation, basing the 3000 FPS off the box 3050 FPS and my barrel being 22 inch and not the standard 24. Here is the link to the chart.
(I meant to add I doubt the small margin of difference at 100 will be distinguishable within any rifles cone of accuracy)
ShootersCalculator.com | comparison
Calculates the ballistic trajectory of a bullet fired from a rifle, handgun or other firearm. Produces a ballistic trajectory chart and table that shows the drop, velocity, kinetic energy, windage, and trajectory of a bullet.