Mate if it helps -the nice guys at Pellpax sorted me a selection of .25 cal pellets for my Bsa 635 magnum (circa 1989) - the ONLY ones that would actually fit in the barrel without tattooing my thumb were BSA Pylarms and Rhinos (milbro I think -green tin) BSA's grouped better and will be my pellet of choice for that gun -available from Pellpax. Cheers Stu.