More details, the cases are all weight sorted and come from the same batch.
Another thing that I have noticed is that the "new" unfired cases have rounded shoulders while the once fired "fire formed" cases have nice sharp angular shoulded. The fired cases also end up being a tad shorter than the new unfired brass.
I assume that the fire formed brass would then have a slightly larger internal volume than new brass.
Could this fire forming process also be using up energy that would otherwise go into producing velocity? Either way I am definately getting a lower POI with new brass at 1000 yards.
Another thing that I have noticed is that the "new" unfired cases have rounded shoulders while the once fired "fire formed" cases have nice sharp angular shoulded. The fired cases also end up being a tad shorter than the new unfired brass.
I assume that the fire formed brass would then have a slightly larger internal volume than new brass.
Could this fire forming process also be using up energy that would otherwise go into producing velocity? Either way I am definately getting a lower POI with new brass at 1000 yards.