[roundball]

Yes, paper shot cups work very well as far as producing good patterns at longer ranges...I tested them on several range trips in a .62cal/.20ga Flint smoothbore. However, there was one major issue I had which caused me to finally give up on them and get my smooth bore turkey barrel Jug Choked 'Full' instead.

The dimensions of the shot cup seemed to be very critical to it opening properly...I could shoot 7-8-9 shots at the patterning board delivering excellent patterns, but about one in 10 shots, the entire paper cup and shot charge would fail to open and go to and through the target like a slug.

I tinkered with the bore diameter dimensions of the shot cups, then the height of the paper of the shot cups to ensure it wasn't folding ove the shot when the OS card was seated, etc...and every time I thought a had it figured out I'd go to the range again but still get the occasional slug through the target.

Since my goal was to fill my turkey tags with a Flintlock smoothbore I felt that as hard as it was to get a Tom in the sights and in range at the same time I didn't want to chance getting the slug effect at that particular moment...so I spent $75 and had my smoothbore barrel Jug Choked 'Full' by a gunsmith in Iowa...dropped my first turkey in it's tracks at 40yds, the second in his tracks at 30yds...and its outstanding on trap targets as well.
(wasted more money at the patterning board with powder, wads, shot, and gasoline than the cost of the Jug Choke)

Liked it so much I got a second GM barrel and had it Jug Choked Imp. Cyl + (half way between IC and Mod)...throws an outstanding dove & crow pattern at 30 yards, and is terrific on skeet targets at 21yds.