I have the same gun and ive had good luck with blackhorn 209 powder and a harvester 330 gr hard cast bullet. This was my first year using blackhorn 209 and im a firm believer in it now. The heavy harvester hard cast bullets performed well out of my gun but i rarely have shots over 100 yards. I was having problems with other bullets not exiting so I switched to the harvesters and have not had a problem since.