Ok, so here is my idea. Take an airsoft bb and load it in an rifle caliber. You could use just primers or get really creative and work up a load with powder that will cycle the action. The bbs are .232"-.233". They would be kind of like hot glue bullets in a pistol. But the question is, what caliber to use? 223 Rem in too small and 243 Win is too big. Is there anything in between? What does everybody think? Could it be done?
And if you are wondering why I want to do this, I just want to see if I can.