ANYTHING SMALLER THEN 3.5" WON'T GET JAMMED, WHAT WOULD HAPPEN IS THE ROUND CAN GET CAUGHT UP. LIGHTFEILD SLUG PEOPLE CAN EXPLAIN IT BETTER THEN ME. WHAT HE SAID WAS, 9 OUT OF 10 TIMES NOTHIN WILL HAPPEN, BUT THAT 1 TIME IT CAN, WHO NEEDS THAT.