I took Falcon's advise a while back and took out that 209 ignition and went to a stainless steel #11 nipple. What a difference in staying clean in the breech. Plus since I shoot loose powder in my XR I suffered no ignition delays, or problems. I have a 1.5-4.5x32mm Bushnell Banner on mine. And my XR will handle stout loads all day long. I was testing some 260 grain Hornady Scorpion Funnel Nose bullets out of it, and to see how it liked the #11 ignition.
Now I happen to like black powder. And so I knew the rifle would be a little high since it is sighted in at 100 yards. But I was kind of pleased with the groups it was shooting at 50 yards that day. And I think 125 grains of black powder and that Scorpion would be a great combination.