Love the original Rollerball, although I really want to find whatever ammo they were using in that Ruger MKII that blows up trees.
Soylent Green is a good one as well, but Eddie Robinson’s death scene gets me everytime. He died of cancer shortly after that movie, and Heston knew it was pretty much inevitable when they filmed that part.
Another one that is worth watching
Star Trek II: The Wrath of Khan
CCI mini mag HPs in the explosive version. I think you can get them at Cheaper Than Dirt.