It seems to me people are getting confused on some pretty important points.

After hearing the chambering concerns from JJ, I measured all the fired cases and loads sent by Ernest. I made a stand to use a micrometer to check diameters at the same place on all cases. I recorded two diameter readings (90 degrees difference)on each case then ploted the larger of each pair. I got two distinct groupings for the fired brass that almost certainly corresonded with the barrels each was fired in. I got similar results with the still loaded rounds and with the four that I pulled bullets from. That suggested to me that even after having been reloaded by "Ernest's friend", those rounds reflect their firing history.

The "regulating loads from John LaSala did not look to me as if they had been opened until I did that as a follow-up to measuring the 39 loads/cases that Ernest sent loose. Those 20 rounds plotted in a different group from the other four groups and all had smaller diameters. John said those were the only 450/400 rounds he loaded for Ernest and explained they should all have produced ~2150 fps. He used his own dies. My guess is that those rounds would not have chambered. I also continue to wonder about the turned shoulders on the A-zoom snap caps - was that required for them to chamber?