FWIW, I had a couple of mags at the FGE preloaded with 150gr Syntech to try in AllenM's suppressed gun and he did not want me to use them with the suppressor so I set them aside.Crap....AE Ammo just dropped some 9mm Syntech subs. Back for a second order tonight.
I have not noticed a suppressor cleaning problem with my semi-auto use of Syntech ammo.