BH 209 is a Nitrocellulose Smokeless Powder. Western Powders recommends using a nitro-solvent for clean-up as Articap has posted, and( unless they have changed their formula lately) it does contain sulfur. I assume the reason that Western doesn't refer to it as a smokeless powder is because almost every powder gun out there(except for the Savage ML) has a warning stamped on them, not to use smokeless powder.
I only shot the stuff a couple of times, and it shot very well, but it is Waaay to expensive for the small differences between it, and other propellants out there for me.
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