Yes, 454 rounds can be loaded with 45 colt dies.
This load is shot from my TC Encore pistol, so use the following data at your own risk.
Lee 315grn flat nose, seated to first crimp groove (closest to nose of bullet) over 30.0 grains 296. Haven't chrono'd it.
220 grain Gas checked HP (custom mold) over 37 grains 296...2207 FPS average from my Encore...
Have fun and be careful... and remember that if you use Win 296 and H110 (they are the same powder) they are not meant to be reduced much from the max load. The starting load is the starting load...do not go under that. This powder works best at or near max.