As a general guide line....Use a mag primer with BH209 if you have any doubts. I dont need them but i have plugs modified to fit them better for occasions they might help. Plugs like the Omega and Impact really dont need a mag primer at all but on the long quick release Encore or Pro Hunter plugs its probably a good idea. I seem to recall there are no less than 2 versions of the Encore and PH plugs.
