I would just go back to the 44.5 gr. load and try different seating depths starting at max mag length or chamber length and going shorter. Then once you find a sweet spot go back and check the 43-45 grain loads. Me I would start with R26 and the 129 ABLR which is what I will be shooting this year. Ran it over 3,000 fps and then dropped it down to 2,900 which I think is where I will leave it for now.

"When you disarm the people, you commence to offend them and show that you distrust them either through cowardice or lack of confidence, and both of these opinions generate hatred." Niccolo Machiavelli