You're right Lewis. They hang over about 1/32" or so. They do adhere to the tape really well and are easy to fold over the edge. But they still easily start down the barrel. I believe the felt wad will make up for the overlap. I'm really more interested in how the ones with the scotch tape will do. If they work good I may just try these:
https://www.amazon.com/Scotch-599039153097-010-300M-300-Pack-Adhesive/dp/B0058FCFOG
They also have these at Wal-mart: https://www.walmart.com/ip/Glue-Dots-Clear-Dot-Disposable-Dispenser-200-Count/19861739