The action on newer Knights stays very clean with the bare primer system. Its a mess though with the plastic jackets in Extremes and Mountaineers.
Ive had no problems with Blackhorn and conicals in Knight rifles with the bare primer. A Powerjunk is basically a under sized conical and many people shoot them with Blackhorn. Add a tight fitting fiber wad or MMP sub base to the conical and its just fine.
