I just checked the net for 22 LR sub-sonic. I found 2 sources, Aguila at 30 cents a round and CCI at 50 cents per round!! I must have lost my mind, fallen down a rabbit hole, and transported to an alternate universe. BEAM ME UP SCOTTY!! I can load my .223 with a couple grains of Red Dot and a 55g cast Lee for about 6 cents. My question is ....does anyone know if firing a subsonic .223 load through the Sparrow suppressor would damage the suppressor? The Sparrow has a monolithic, one piece core so it doesn't look to me as though a low pressure load should damage it, but it's my first experience with suppressors. Any experience out there?