Hi all...below are the start of my cartridge pens they are currently .303 British ; 7.62 x51(.308) and 7.62 x39(AK 47)...here i have the problem...303 a little long but delt with .308 spot on...7.62x39 well short. Does anyone know of a mid size kit that may fit...i thought about the credit card kits" too short" mini bolt action refils also....i have tried cutting a std cross refill down but it wont withdraw into the top case....is my only solution to turn a wide mid ring cos that will look wrong again any ideas