All autos should have a taper crimp. If you are using the dillon dies you already are using the taper crimp. I suggest the Lee factory crimp die. It sizes again as it tapercrimps, so if you should compress your brass as you are seating the bullet, it will be correctly sized. I know I feel much better shooting my reloads using this die. BTW it only cost's $12.47 from midway, what do you have to loose, but headches?
10MM Magnum.... tried the rest, now I got the best