I've been looking into this collar button stuff a a bit, and think I may want to work up some loads. A big issue that I see, though, is that the typical Lyman Collar Button looks to be pretty pointy. Are people loading these in a tube magazine, or single shooting them?
If not that boolit, then how about a .490 round ball that was pushed through a .460 sizing die? From what I've been reading, several people do this and report it to be pretty accurate. Would these be able to be loaded into a tube magazine without the boolits being pushed back? I use RCBS Cowboy dies, which do a nice roll crimp. But with a round ball, elongated, there's no crimp groove to roll the case mouth into. So I thought about building some sort of an apparatus to create a small crimp groove...am I over thinking this?
At the end of the day, I'd like to have something of the collar button nature that's safe to run in a tube magazine.