I had leading from my previous experiment with a .438" bullet patched to .450. I got out the chore boy and the bore light and my bore was spotless. I doubt there were any wet spots, my wet patches are more like damp and I was pushing one wet one through and getting out a ton of black fouling, scrubbing the chamber and first couple inches of rifling with the second moist patch then pushing it through, then spinning a dry one through the chamber and pushing it down the bore. This is with a brass jag on a flexible carbon or fiberglass cleaning rod. I was hoping to get the chamber really clean and get the bore decent. The bullets wouldn't chamber if the leade and first inch of rifling were fouled. It would still take four or more additional wet patches pushed through to get to brown smudges instead of black smears but the heavy fouling was all pushed out.
My first shot was a nice round hole in the target then it got much worse. I don't imagine the competitive shooters are wiping and scrubbing for five minutes or longer between each shot? Maybe the Goex needs a lot more compression before it gets less fouling?
I am also concerned that I only found patch bases again- cut neatly around the 90° angle at the bullet base. I don't know if the sides went into the berm or what? I can pull the bullets out of the cases without damage easily by hand- they are not crimped in hard.