Yes - in .69, 2, 50's, 2, .58's, .1 .45 and 1 .40.
The first time I tried it, I could not keep the top ball on the bottom one that was loaded with a patch.
The rod & patched top ball followed my hand up off the bottom ball to 1/2 way up the barrel due to the trapped air between the balls. I had to
pull that ball. From then on, I dropped the first one into the bore, then loaded the patched ball.
Lyman did a test on this back in their first Black Powder Handbook. Their photograph showed both balls obturated to fill the grooves, the top ball
being patched, as they exited the bore. The balls were no longer round, but flatted into one another.