Its kind of strange i can ignite any recommended smokeless powder in my Savage with a Win209 100% of the time with a clean flash channel. Smokeless can't be easier to ignite than BH209 and the Savage plug is not even quite perfect IMO.

I always hunt on a clean plug and i cant imagine why anyone would want to hunt on a dirty plug. It only takes a few seconds to remove the carbon. The only reason i ever use a mag primer in my Savage with some loads is the extreme spreads are a little better.

My NULA is also flawless with a standard CCI primer and every powder ive tried. It even loads loose compared to all my other rifles but still shoots fantastic.

I went through nearly half a box of WinT7 primers in a Lehigh plug without a hiccup in my Knights during a single range session.

Sounds like a plug design issue to me, not a lack of power in the primer. Its the lack of that power/heat getting to the powder.