Thread: Chronograph in taupo wanted.

Originally Posted by Blackfern

284 win with 59.6 grns of superformance. 150 grn long range accubond and Norma brass. The chronograph rekons 2805 out of an 18 inch barrel.
Yet to get the dope correct out to 610 yrds we had to input a speed of 2980 fps to be bang on with applied ballistics.

Putting the projectile into the lands vs say .05" can result in a change of mv of 100fts. Also there's using magnum over large rifle primers (not heaps but it can effect it).
AB needs you to put in ALL atmospherics and data in order to get it right. Are you fairly confident? Density altitude can cause a few inches of POI change too.