Water swatter.. Here's a Colorado legal load that gives excellent results in my old ( early 70s vintage) T/C Hawken .50 cal...

Noexcuses 460 grain conical...80 grains loose 3F 777... #11 cap...

In my rifle this load is very accurate and knocks the hell out of deer and the one bull elk I shot with it.. I first tried 2f 777, but ignition seemed a tad slow, so I went to 3 F and that seems better...In any case, I have NEVER had a failure to fire while hunting with this rifle..One precaution I do take is to snap 2 or 3 caps to be sure the nipple is clear before loading..