I started out with the little brass push-primer thingy, and 4F Goex...
then somebody here on the Forums said, "... hand grenade...", and I went, "Wait... WHAT!?!". About that time, in another thread, there was a long discussion about relative ignition speeds of the various grain sizes of Goex.
Since then, I've been using the main horn (2F Goex) for both charging and priming, and dumping any excess: haven't had an issue yet with that method. She always goes "BANG". Figured, if it worked for the oldtimers, it'd probably work OK for me.
On the other hand, I'm not a competitive target shooter, either. About the smallest group I've gotta produce is minute-of-jackrabbit.