Here's a link to an excellent article in Muzzle Blasts that you might find of interest with regards to yer ignition issues ...
http://www.muzzleblasts.com/archives.../mbo44-3.shtml
Also, I'll add - yer rifle has an ante-chamber and if it starts to build up with crud it will kill ignition pronto because it obfuscates the touch hole or mitigates the powder charge. It must get cleaned out and be left dry. I use a .32 bronze brush with a patch wrapped around it, work it in good with a moist (not wet) solution of whatever (including just plain water) and follow up with a dry patch or two.