here is my only other attempt at load development using seating depth first and I was wrong in my post above, these SMK's like it dead in the lands. I have yet to try any powder or primer tweaking. .6 MOA 10 shot group at 300 though is promising
It is amazing what a difference in group size you can get just by moving the seating depth a few thousandths. Even without the flyer on the .015 target that group was visibly larger than the top target. I did not even scan in the .030 and .050 target