Took my new CVA OE to the range to try and work up a load for the upcoming blackpowder season and had crud ring issues. I was shooting triple 7 2F powder and the weapon would develop a crud ring after every shot so as to prevent another bullet from being properly seated. I was having to remove the breech plug between every shot and clean the barrel before I could reload. Also noticed that the breach would be covered with a grey grease like coating. I tried both pellets and loose powder with the same results. Was using Win 777 and kleanbore primers with little change. While cleaning some unfired powder would also fall out of the barrel. Has anybody else experinced anything like this. Would appreciate any help anyone could offer, I really need to get this problem resollved. Thanks.