I'm thinking about getting another suppressor. Right now I'm leaning toward 9mm. First off, is there a recipe for 9mm subsonic rounds? Second, if I cast my own 90gr. bullets, can I use them for subsonic rounds or will they screw up the barrel/suppressor? I use pretty much lead rounds exclusively in my .22lr suppressor with no problems. But I'm not sure how cast bullets of a larger caliber would do. Thanks! -Emt1581 Wanna kill these ads? We can help!