Rollingb, when I got mine, the rifle barrel was an option, but I allready had my .54 Hawkins, and .45 Kentucky, so I didn't opt for the rifle barrel, kind of wish now I had. I got mine at the "Beaver Bag" in Las Vegas, they since went out of business, which is a shame, cause it was run by a couple of old timers, that really knew their stuff when it came to BP. Most of what I learn now is from this thread, or by experimentation, which is half the fun. I also have a Navy SXS in 12ga. which I shoot the same load, but after traipsing thru the brush chaising my yellow lab, it's a lot easier when I get home to clean just the one barrel, and the single barrel doesn't get as heavy at the end of a day. It's hell getting old and lazy! Somebody else mentioned, that you might be using to heavy a charge of powder and blowing holes in youir pattern, this happened to me, recently with smokeless loads I was developing for trap, trying to get a 1 1/8 oz of 7 1/2 to reach 1290-1300 fps, I knew I was on, and even my shooting coach couldn't figure out what was up, until I went to the patterning board, dropped the load back down to 1200 fps, and did very well all the way back to the 27. RR