RE: Coyote Gun
If your looking at sidelocks, then the Renegade would be a good choice. It will shoot to 100 yards without problem. Instead, look into the Lyman Great Plains Rifle in .54 caliber with 1:60 twist. I think if you are wanting to shoot roundball, this would be a much better choice. You can also get some nice peep sights for the Lyman which make it a very accurate choice at 100 yards.
If inlines are in your future, they are selling a T/C Black Diamond XR for under $200.00 at Bass Pro Shop. Load this with 110 grain of FFg and a T/C Shockwave and you can knock a yote out a lot futher then 100 yards.
Knight is having some great sales on Wolveines right now, and they are also great shooters. A 240 grain Knight Sabot and 100 grains of FFg and you have dead dog.
Good luck in your search for the right gun.....