Quote:
Originally Posted by 251120
anyone have the holdover for `260rem using 47gns RL19 and Sierra Pro-Hunters at 2980fps over 100.150,200,250,300 and 350yds from a 20" barrel
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To calculate the "holdovers' you also need: height of the sights over the bore, the air density which comes from altitude, temperature, and barometric pressure, your zero range, the bullet BC, and muzzle velocity. You only gave muzzle velocity. The cartridge, barrel length, caliber, brand of anything and powder don't matter. The bullet weight only matters if you want to know bullet energy and momentum. Sierra gives G1 BCs for all of their bullets on their website.
You apparently have a computer or you wouldn't be posting here. Why not run a ballistics program yourself? This is a good on-line ballistics program :
JBM - Calculations - Trajectory
That may seem like some work to fill out the form but without correct input numbers it's garbage
in = garbage out. The output cannot be more accurate than what you input.
JBM's site also has a list of various programs for various computer systems, both free and for purchase.
Linear Mode
