Big time. Cast bullets, too. I like loading the stuff almost as much as I like shooting it.
I currently load 38spl, 357, 9mm, 223, 30-30, 7.5x55, 308 Win. And that's my "skinnied down" list of catridges. I used to load a half dozen others.
I limit my bullet casting activities to .358 cal (for all of the pistol calibers above), and .30 cal (for the three .30 cal rifles above). I also cast buckshot and slugs for 12ga and .45 connicals for my muzzleloader.
My most recent efforts have been working up a .223 deer hunting round, and experimenting with paper patching for the .45 cal muzzleloader. I think I've finally got a winner on the muzzleloader bullet. I'm using cigarette paper, wrapped twice around a .450 200 grain Lee conical bullet. It gives a decently tight fit in the bore of my CVA Optima Elite .45, but still stuffs down the barrel readily. Shot some really tight groups at 50 yards last weekend with Blackhorn 209 powder (LOVE that stuff).
Figuring that kind of thing out is what makes it so fun. Lots of variables to tinker with.