I would start with polishing up the bore and relieving uneven pressure on the forend. Then shoot about 100 rnd through it clean it several time in between strings of shiots. Then fix your rest as decribed above and give it another try.BE SURE WHEN YOU PULL THE TRIGGER THAT YOU PULL IT ALL THE WAY AND HOLD IT FOR JUST A SPLIT SECOND. Otherwise the tranfer bar may pull back to soon giving inconsistant ignition. This seem strande but its true.