I have not seen the thread your talking about. The red plastic jacket breech plug in a plunger gun is a huge benefit. It keeps the 209 primer contained in the jacket. A much safer way to use a 209 primer in a plunger gun.

I thought the only reason BH209 was not recommended in those guns was because of ignition????? I also don't believe everything you here from the manufacture. Didn't Western Powders tell someone on this board it was okay to mix powders? On the can it says DO NOT mix powders of any kind, or grade.

I still prefer to do the R&D myself. I do use the manufacture for some guidance.