RE: Rifle and Muzzelloader review
Without knowing what kind of terrain and ranges you are looking to hunt deer and bear, I would suggest the .30-06 or .300 win mag (if that is what you meant by .300?).
As far as a ML, what kind of money are you looking to spend? I would suggest a Savage 10ML-II if cost is not a huge issue, around $400-550 for one. They are fantastic, and can shoot smokeless in addition to BP substitutes. I would check you regs, where every you live regarding ML's first though.
If money is an issue, you could look into something like a Traditions Pursuit, which I think is around $250ish or so.
Good luck.