Insane23

Have 209 kodiak pro had it for a few years never had a problem.well until now ! Had a shot at a doe and gun misfired just kind of fizzled out the barrel . Came home reloaded tried again misfired cleaned gun thoroughly shot. 2 primers reloaded fired no problem. Clean again fire 3 primers, .take out again that night guess what misfires again! 2 different boxes of 777 pellets,using 245 grain power belts, anyone have any ideas?