I use the Dinsmore shot in all sizes with match fishing for carp and never had a problem with it.. I even use it on 2-3lb test line and doesn't kink it at all..Anchor is another good one, but I think it's only available in the UK. To answer your question on sliding issues, just for an example bigger carp in the weeds move the shot occasionally.. JMHO I use it and like it..
EDIT: There is a divot in the shot which makes removal easily, I use my thumb nail.