I finally got to shoot the custom .54 today and I must say I am pretty pleased with it. My first shot hit the top of the black at 50 yards so I lowered the rear sight down a few clicks. The next three shots hit right on the left side of the 1 1/2" orange dot. The three lower bullets are from my friend's .243. My 3 shots #1 and #3 almost went in the same hole with #2 just above them. I still have a lot of work to do with it trying out different patches and charges but it looks promising.