Originally Posted By: Tom C
What's "rivelling"?
From "Shotgun Technicana"....'a rivelled gun barrel is a wrinkled gun barrel, one that's corrugated, pleated, or rippled in a fairly regular pattern. The pleats might be wide or narrow.'. I personally like to think of it as akin to intussusception, or a sort of invagination. No one really knows what causes this in shotgun barrels, but it is not a good thing, and these guns with rivelling won't pass proof in the UK unless remedied, which is apparently very difficult to do.

Socialism is almost the worst.