n working up and testing loads for a 2" gun I also learned quite a bit about fiber loading of shotshells. Also I came upon an interesting paragraph in the Chapter "Unraveling Rivelling" in the book Shotgun Technicana by Michael McIntosh and David Trevallion: "We also have a notion that rivelling is more likely to occur from cartridges with fiber wads than with polyethylene wads, simply because fiber is capable of setting up more friction than the slicker, smoother plastic.(This isn't to say you should avoid fiber wads, but we do recommend that you be extra diligent about keeping your bores clean if you shoot them.)
Can you explain what rivelling is? I thought you meant wrinkling the cartridge walls, which I have not had happen with fiber wads thought it does happen with plastic. But a clean bore would have nothing to do with that, so apparently I do not understand rivelling.
![[Linked Image from i.imgur.com]](https://i.imgur.com/qclHjMQ.jpg)
