I just got a 9mm suppressor (YHM Wraith), and tried it on my Glock 17 with a threaded Lone Wolf barrel. My 124-grain ammo loaded for USPSA production cycles perfectly in my G17, G26, & G34. It also functions in the G17 with the Lone Wolf barrel but no suppressor. As soon as I install the suppressor, the gun goes into "bolt action" mode. I added about 0.4 grain of powder to a few rounds and got the same result.
I also tried some factory Winchester 147-grain bonded PDX1 personal defense rounds, and it still did not cycle with the suppressor installed. Before I try loading hotter ammo, does anyone have any suggestions about what I might be missing? Thank you for any guidance.