Oh crap.
I feel for you. I had a number of them during the ban.
The 10 round mags are even worse than the 15 round mags. The 10 rounders never seem to get better.
I would probably still run 9 rounds in my reload and just manhandle the 10 rounder into position.
My wife also uses a G19 and she has trouble doing reloads at full capacity with the slide closed.
I found this out after loading 15 rounds for several hours in a training class and causing her to fumble reloads. She wasn't amused.
