Hello and welcome. If you're an avid outdoor person you will fall in love with muzzleloader hunting/shooting as everyone in here has. And you have come to a great forum for information and also a bit of ribbing so I hope you have a little thick skin. Mountaineer is correct about handling the rilfes. You may also want to handle a couple CVA rifles too as well as Knights. I cannot give you too much advice on inlines as I prefer to hunt with sidelock (percussion and flintlock) rifles. But I suggest, if you are going to be using your ML for elk than you get a 50 cal minimum. And you will want to use a somewhat heavy bullet for them. I'd suggest something in the 300 gr range. Some guys use 250 gr bullets but IMO they are a bit light.
The inline shooters in here will be glad to help you out. We even have a few on here from CO. Good luck to you and stay here. IMO this is the best ML forum with the best guys around.