I would like to use roundballs. Maybe a ball-et in the 54. I would like to try the 58 for elk with roundballs. I think it would have alot of nock down and would put elk down in 20yds or less with the right shot. The 54 is still a real big caliber. It would take an elk with no problem. But is doese not hurt to have a variety of calibers. I went hunting in Texas and lost a small deer using a 243. The next day a guy found it and said it was a perfect shot. I just like to make sure I wont loose an animal. I also dont wantem to suffer that much at all to. I know I dont need to be so worried but 58 is a nice caliber!