Let me preface this by saying that my son and I are pretty new to muzzleloaders. Last year he bought a CVA Wolf. Fired it many times in weather 20 degrees and warmer and NEVER had a misfire. Well this is Minnesota and 20 degrees in December is often a fantasy but thats when we have our season. The other day he had an opportunity at a nice 10 point buck. Put him in the sights at under fifty yards and let go. POP. Nothing. Try another primer. POP. Try a third. POP. By this time the deer was gone. He was using Blackhorn 209 powder with a regular 209 primer. Flashhole was clean. When he got back we tried a warm CCI Magnum primer. BOOM. Problem solved. Nope. The next day he had an easy shot on a doe and needless to say the same damn thing happens. You can imagine his frustration. Time for dad to get serious. I took out the drill and a 1/16" bit and made the flashhole a real flashhole. The primer now gets a little sooty but nothing serious. Finally yesterday he got a third opportunity at a nice doe. Temp was around -5 but finally everything went BOOM and she fell in her tracks. He's shot several bucks in the past but I don't think he's ever been more proud of himself. Would a different powder have worked better? I don't know. Flame me all you want for enlarging the flashhole. I'll probably get a new breech plug and test with some different powders before next year (any suggestions for extreme cold???) but for now I'm just happy we found a solution before the season was over.