So here is a further effort with my slightly cranky Bergara B14 223.
Attachment 250914
This group measures 1.056 moa with ballisticx.
However the rifle tried a new trick. I swapped primers to Rem 7.5s to see if that would reduce my ES's. Confoundingly it reduced group size (yes Gimp , sample isnt big enough haha) but the bloody ES went through the roof to 132. It included a very sight hangfire, the click//bang sort just long enough to register (my technique must be ok cause the shot didnt fall out of the group. A bit of s puzzle. For what its worth heres the velocities I recorded:
2768 (cold bore, centred group, thats something!)
2740
2761
2635
2683
2743
2722
2647 hangfire!
2689
2711
Thoughts?