I guess I have been worrying for nothing. I took a few sample shells out of this new batch (ones that were most out of spec, either up or down on OAL), loaded them in a mag, donned a leather glove on weak hand, put a tree betwixt the gun and my torso and fired them.
No Kaboom. Also ran a mag of WWB's just for comparison. Could tell no difference in recoil, sound, feed or ejection. Cases all looked like they did before I reloaded them. No bulges, primers looked like they were fired from a Glock......which they were.