Depends on what you want out of your 10mm. Mine is a screw around gun, a revolver, and I don't need to load it hot. I put 12.5 grains of AA #9 under a 200 grain XTP loaded to whatever Hornady's manual shows they loaded 'em to. Goes boom, smacks things hard enough (if I need harder, I have several .44s and a .454), and is mostly accurate enough. I'm using RCBS carbide dies. I don't worry too much about crimp, just make sure the flaring of the case mouth for seating is gone. 10mm isn't a big kicker so there's no point in looking for a problem it doesn't have.
If you're trying to get every iota of energy or momentum out of it, with a cast bullet, can't help. For cast in my gun I toss the .38-40 cylinder in and shoot my cast bullets from that.
Tom
