I’m by no means a Encore shooter, but I have a buddy that tried. Made sure his breech plug was cleaned. Had been shooting Pyrodex and cleaned barrel and the small ignition hole.
(Once I showed he was amazed how much carbon came out of the flash channel using the drill bit)
Still had some non-ignition now and then. Not for hunting then.
Using MMP sabot and .451 sized 250FTX. Good fit.
I’ll be modifying his breech plug for BH209.