I have only owned a Traditions with the removable breech plug until now. I bought a Lyman Trade Rifle that I have been wanting for years. I have found that the hooked breech plug is non removable. In the instructions it says to use a .38 cal brush to clean this. I put an order in to October Country and added a scraper to my order. I am not sure if the scraper will even work as it was a .50 cal scraper, plus I dont know if the channel is flat bottomed or cupped. I am just unsure about the whole deal as it is new to me. Is this what is referred to as the Patent Breech? I would sure like to find a photo of one in a cross section or removed from the barrel to get a feel for what is hiding down there. What are peoples experiences over time with maintaining this style? I would appreciate any input or advice. Thank you.