When I saw the first pic I figured that was the powder you were using. I started out with AA1680 in the X 39 an had excellent results with it but anything made by Accurate became hard to find in this area back during the last powder primer shortage so I switched over to Reloader #7 got the same results an never looked back and it's more versatile in lots of other cast rifle loads as well.Should add, I was using A1680 to push 123gr Hornady SP's. Had a box of factory Hornady 123gr SST's and honestly couldn't tell the difference between the two.
Here is one of my old test load targets from my load workup days many years ago.
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