So I had some cases I needed emptied so I took a buddy out to to shoot steel and water jugs at 500 yards. He has never tried to honestly hit anything past 100 so I figured he would have a good time. We get set up at a new spot and range the target at 487. Shooter told me 7.6 minutes so I dialed 7.5 and for a 6mph quartering wind. First shot hit about 1" low of center on a 10"x10" plate.....perfect. I send another round and hit the plate right on the lower edge......ok I yanked it. Third and fourth shots were just under the plate.....WTF! I dial up 1 minute and am back in the middle of the plate. It stayed there and we continued to shoot and bust steel and water bottles.
This is a proven load and have shot it to 775 yards. The rifle recently made a trip to Northern NM and was subject to sub zero temps. I never had a chance to shoot it up there so im not sure of how it would have performed. I did a velocity calibration and it showed a loss of 140 fps. I am not too concerned right now because I don't plan on shooting these loads again. I needed to empty some cases for new load developmet. I just dont understand what happened. I double checked all the data in Shooter and checked the atmospheric inputs that Shooter input against my Kestrel
(station pressure) and everything was good.
The load was