Variflame primer adapters are the way to go. Bought the system last year and have shot over 100 times with the system. I use 100-150 gr. Pyrodex Pellets with awesome results. Touching groups at 100 yards with that set up. This is out of a TC Encore 209x50. You can pick them up at Cabelas. They are on Precision Bullet Web site if you want to look. The other breech plug conversions operate on the same principle and are great also. I use large rifle primers and get complete ignition of the powder and the less fowling with just the primer. Even less than the Kleenbores.