shooter50
Does your Renegade have a clean-out screw in the bolster, if it does take it out and see what the flash channel into the barrel looks like... you may have to clean it out further with pipe cleaners... The other thing is how much crud (hard crust) material is in the bottom of the breech plug. The make an attachment (fouling scraper)for you cleaning rod to scrape that out if it is necessary..
http://www.trackofthewolf.com/(S(tslz1aji0tfupsny13eacb22))/categories/tableList.aspx?catID=6&subID=49&styleID=15 0
Are you using #11 mag caps?
I just can not beleive that Pryro would not ignite without problems. I shoot T7-3f in all of my sidehammers.
The key in my mind is to get as much heat and flash to the powder as you can especially in cold weather.
One way to do that is to make sure that the flash channel is clear... Then if possible always get powder out nder the nipple - that is the reason that I use 3f powder - I know I can tap that out under the nipple fairly easy.
The last point I think is important is the nipple - for years we used the standard #11 nipple with the longer stem and at times we did fight them, especially in cold weather. What we found, even with all the fancy nipples out there, the standard short stem TC nipple worked best - it cuts the distance that the flash has to travel.
This picture kinda shows what I am talking about... the3rd nipple from the left does not count- it is a musket cap nipples.
The 4th nipple from the left is a standard long shank nipple, Hot Shot the nipple on the far left is the short TC nipple - you can see how much that shortens the flash path to the powder. I firmly believe that this helps ignition of the powder.
Just my 2c's -