Back during the Great 2008 Primer Shortage, I was using magnum primers for everything. Including 9mmx19.
I just started at starting powder loads, as there was a pretty good range of powder drops on the powder I was using. They worked, no high pressure signs, cycled the pistols, ejected, bullets on target.
With standard primers and using W231, minimum powder charge for 125gr RNL won't cycle reliably feed the next round but will eject the empty from my XD9 but will cycle everything else.
Hope that helps.