You did not say where you are and how you are going to get to Colorado. If flying you cannot carry muzzleloader powder so you will have to find some in Colorado that matches what you are using for set-up. If you are driving it is a different story as you can take it with you. If I could get it; I would try to work out a 90-100gr. load of Black Mag'3 pushing a 348gr. Powerbelt or similar conical that falls into the Colorado legal description. I shot my elk this year with BM3 and had to reload quickly for a follow-up shot to drop the elk before it got out of my recovery area. I could not have reloaded as quickly with any other powder. BM3 is so clean the residue in the barrel after a shot is almost none. I get a little gray powder on a patch.