I had a Brno 602 .458 backup rifle some time back. It used to feed Woodleigh and Hornady 500gn softs very well.
Winchester factory softpoints would often cause feeding problems.
The Winchester factory softpoints had a larger diameter of exposed lead at the nose of the bullet, and this would sometimes snag the edge of the extractor recess on the right side of the barrel chamber.

I solved this problem by selling the 602, and replacing it with a .470 double.