Once fired brass will change things up. Some rifles and chambers more than others. Some rifles I got very little change and on my 338 EDGE i had to lower the charge weight .5 to get the previous FPS and then it was the same accuracy and single digit SD spread.
Awesome story. I took my girls out dove hunting yesterday, to the same place my dad took me when I was a kid. I can still smell the same smells, of the wet sage in the desert. It was a great time had by all.