click on this link and then go down to "safety" and read a couple of articles:
http://www.chuckhawks.com/index2h.muzzleloader.htm
It just doesn't seem to be worth it when I get great performance at around 100 grains, I don't flinch from the recoil, and I don't have a stiff neck the next day. That said, your powder/bullet combo in that gun is probably safer than my drive home tonight........