wow!-appreciate the fast replies-i use remington 209 primers-my pellets are about 1 year old(stored in a cool dry place)-gun been fired about 110 times,the 1st70 grouping well,and the most recent 40shots going all over-always cleaned the gunthoroughly after shooting---so now i will re-scrub the bore,use new powder,get a new plug,and scrape away at my synthetic stock until i canslide a piece of printer paper between the barrel and stockdown to where it has to be in contact with the stock(the area where it bolts to the stock)ok,lots to do here,i better get started[:-]