It sounds like you and your father are new to hunting and the shooting sports. I highly suggest taking a Hunter Safety course. I would think it would be mandatory, especially for you. Pay attention and ask plenty of questions. Sites like this one are great as well.

And like the others said, No you can not just bore sight a rifle and expect to hunt or do any kind of real shooting with it. Basically all bore sighting does is let the gunsmith now that the scope lines up properly in the mounts so he can make any adjustments if he needs to. You want it as close as possible before you start adjusting the scope. You should still make your first few shots at 15 to 25 yards just to be sure they are close and move back from there, like say check it at 50 and then move back to 100 or so.

Shooting any rifle takes some practice and time. You need to learn your particular weapon and get to know what it and you are capable of. This is a must before actually trying to harvest game with it. And muzzle loaders even more so because the difficulty level is higher do to the decreased trajectory and the way you load them. You need to do some homework and experimentation. I suggest if you know some one that uses a ML you ask them if they can help you out a little the first couple of shooting sessions. Being ignorant (notice I didn't say stupid, there is a difference) could cause you to miss or wound game, or more importantly you could injure yourself or others.

These are not toys, they require, no demand the proper respect given to any other firearm. These things are basically pipe bombs with a trigger on them.

I would also suggest from the sounds of things that you take some time to get familiar with your new weapons. As in don't hunt this season at all. Wait until next season when you have had time to practice and now how your weapon operates properly. Confidence is a HUGE thing in hunting. There is big difference between wondering if you can hit your target, and Knowing you can hit it. Most hunters would agree that if you have to ask, you shouldn't take the shot.

These things are very fun to shoot though, you and your father should have a good time learning together. Just take your time and do it right.

Paul