RE: some questions....
If you want something that is closer to a true Hawken rifle, get a Lyman Great Plains rifle! They are about the closest thing to a real J & S Hawken that you can get, short of a custom job!
Now, the Great Plains Hunter Rifle has a fast twist for conical/sabot bullets, while the other version (Great Plains Rifle) has a 1/66" twist for round ball shooting. For deer or elk up to 100 yards or so, a .54 round ball is as deadly as any other kind of ML bullet, and shoots flatter to that range because a round ball can be fired at up to 500-600 FPS faster than a big conical.