This thread is an oldy... but it comes up in search results pretty high.. and it seems to lack the fix: Badger Ridge's sealed breech 209 conversion: http://www.badgerridgeind.com/store/p10/700ML_KIT

no kidding, this kit seals the breach, lets you use any black powder substitute (even blackhorn209). It just plain simple to use. No priming tools, no blown up primers and crap going all over the shooter. No more burnt scopes, and No more tearing down the bolt, and my rifle goes bang every time!