I just got the off the phone with knight rifles. They said I can shoot blackhorn powder with my rifle if I get there improved vented breech plug. They have been shooting blackhorn powder out of there rifles for 2.5 years. They redesigned there breech plug when blackhorn powder started becoming popular. I do understand some of your safety concerns but I really wonder if to much powder was used or older worn out rifles.
Where my bolt locks after the shot I don't see how anything could come out with proper powder charges. Has to be someone on here that has used this combo. I plan on ordering the vented plug and go from there.
Thanks