I am guessing that in-lines are all right. You did not mention any restrictions on the type of muzzleloader needed. Seeing the range you mentioned, there are some nice Knight in-line rifles on sale right now. A .50 caliber Wolverine I believe was going for around $199.00. Add a scope to that and the necessary stuff to get shooting and you would be around the $300.00+ range. There are other less expensive loaders that would do you just fine, but I alway felt that you should buy the most gun you can afford. A Knight rifle is really a good shooter according to other board authors. I personally do not own one. Others on this board I am sure will suggest some others. They can also tell you sights where different ones can be looked at and purchased. In the mean time, start reading some of the back postings, and also start looking at the different rifles out there. You will have a lot of choices and decisions to make other then... looking for a good gun. What ever you decide, I am sure your Grandfather and you will have a lot of fun with this sport.