Oh okay the deplex load you mean?
Western Powders Okay'd my 5 grain jim shockeys gold booster charge i used in my sidelock to help ignite the BH209 with a #11 cap. They said it produces no where near enough spike in pressure to cause any harm.
Seems like its the only thing left now unless Hubbard gets a new company to build his mag sparks to his specs. I emailed Lehigh to see if he'd take over the building.