I just had a need to pull some .577NE rounds. They won't fit in a kinetic puller nor my RCBS collet puller. After looking around a bit, I clamped them in my action wrench and used like a kinetic. Worked like a charm. I know not a lot of guys need to pull .577NE rounds, but some do and I don't see why it wouldn't work for other big round too like the .577 Snider and maybe shotgun slugs, but I have not tried that.