My G21 has a Gemtech Blackside and G19 an Abraxas can. Neither gun shoots reliably with subsonic or more powerful rounds. Frequent hang ups, stove pipes and failure to feed issues. Take the suppressors off and they function just fine. Use LoneWolf barrels on both. Do I have too much lithium grease in them? or not enough? Winchester 147 grain, subsonic 9mm and 115 grain CCI. Winchester, Federal and Georgia Arms 230 grain .45 used. I've not previously owned suppressors and was sure disappointed today with the lack of performance. They jammed cycling on the very first shot. Do the barrels need to be shot more to break in before screwing on the suppressors? Help, I'm ignorant.