Hi Frank, is there a particular reason you want to change your ball/patch combination.?? Im no expert but i would
think the patch needs to be thick enough to seal between the ball and barrel. Don't know if a .005" patch would do
this. I seem to remember using .012" in my Lepage with a .535" ball but don't hold me to that as it was years ago.
Im sure i don't need to say this but; Just as a foot note. If you use a too thicker patch and the ball is VERY TIGHT!
don't be tempted to shoot the gun unless the ball is all the way down on top of the powder. All the Best, Tim