If you're getting delayed ignition with BH209, it's most likely your breech plug is partly blocked by residue. A wire pick won't remove it, it has to be dug out with proper-sized drill bits and solvent. Also, lubricated lead bullets don't have enough bore resistance for proper ignition and burn with BH. I've had Ball-ets bloop downrange trailing smoke like bottle rockets. Very pretty, according to my wife!
Well the first mistake would be using ball-ets. They are very light and short for caliber. BH209 works just fine with lead conicals if they have enough mass/length and you use a veggie wad. Ive shot tons of them from 350gr upto 490gr without a fizzle. There are other factors too like how well the breach plug works with BH209 and sizing the conical a couple 1000ths over land size.
