Okay, just food for thought. And in no way conclusive. But...
I've posted on GT about my Gen4 21 had weak ejection with old gun show reloads, but it doesn't bother me. Ejection is fine with SD rounds. Ejection is also fine with my Gen4 27.
So Saturday I took my 21 out in my new light bearing holster for an ATV ride. Took along 100 rounds of my old reloads. Stopped by the range and fired all 100 rounds with my TLR-1s attached. Ejected perfectly.?
The two loudest sounds known to man: a gun that goes bang when it is supposed to go click and a gun that goes click when it is supposed to go bang.