There were 4 different 50gr. Solid Bases. Expander, Spitzer, HP, & HP Match. I used some of the expanders on groundhogs. They were comparable to Sierra Blitz or Hornady SX... 'splodey parts. Going back to early 80s bullet technology, 50s were generally thought of as varmint bullets. I'm unsure if any of them have thick enough jackets for a pig's skull, but then I've never shot a pig's skull either so...
