Rat Trapper--I appreciate your courteous response. However, you and the other responders need to understand a couple of things.
One is that I was the factory test shooter for Goex from 1996 until 2009 when Hogdon purchased Goex. During that period I test fired and chronographed every lot of sporting powder that left the Minden plant. I was also privy to technical points such as the ignition temperatures of black powder and the various substitutes. So I KNOW that the substitute powders are roughly twice as hard to ignite as is black powder. I was around and actually helped develop the ascorbic acid based substitutes, and test fired all of them.
I was often called upon to trouble shoot rifles that were either innaccurate OR GAVE IGNITION PROBLEMS, especially caplocks. The rifles that consistently had the most ignition problems were TC Hawkens or Renegades. The breech plug design of these rifles is susceptible to having a flash channel that is often not properly cleaned out during the casting process. While the overwhelming majority of TC Hawkens and Renegades give no problems, there are some that require extra effort to get to shoot.
I am reminded of a Goex employee that offered his Renegade as a test rifle. When I received the rifle, it had a musket nipple and used a musket cap. Ignition was fine WITH THE MUSKET CAP. When I replaced the musket nipple with a standard nipple and No. 11 cap, the rifle absolutely would not fire any of the substitute powders--and it is the only rifle I have ever seen that would not ignite black powder with a standard No.11 cap.
When we pulled the breechplug, there was casting debris on the walls of the inside of the breechplug. We took a dremel tool and removed the slag, and the rifle went back to work with the musket cap and nipple.
I made my original post because of two things. One is that the OP stated that he was using a Renegade, and in my experience these rifles have a higher than average number of ignition difficulties. The other reason is that I KNOW that the substitute powders require roughly twice the temperature to ignite as straight black powder, and if I am hunting anything, especially elk, I don't want ignition problems.
I'm sure many of you have TC Renegades and Hawkens, and have had good luck with them. I just didn't want a new guy to run into a fixable problem he didn't know existed.