Huh? They have no powder? If they are 22 shorts, they probably don't have enough poop to cycle a semi-automatic action. Look up the Marlin 60 and see what the manufacturer says it will shoot safely.
EDIT: I just googled the Marlin Model 60 Manual and it specifically starts out saying it's designed for 22 Long Rifle ammo only!!!
Last edited by Topgun 3006; 08-09-2014 at 03:05 PM.