I am considering building a big-bore rifle in the near (hopefully)future. The main purpose for this gun will be blasting bowling balls and ice blocks, maybe shooting an occasional deer or elk, and bolstering my dream of Africa. The doner action is a Interarms Mark X 7MMMag. Up until recently I was going to just have a 458WM made but after some discussion with my smith I am considering a 416 Taylor...more discussion...question about the availability of cheap 416 bullets. There are quite a few non-premium 458 bullets out there. Two questions: Are there some relatively inexpensive 416 bullets out there I am missing, and does anybody have other ideas for a similar cartridge that I might have overlooked? The limitations of the round are; fit in a standard length action since it is mainly a toy inexpensive components obviously I don't mind a wildcat but I don't want complicated brass prep. Fireforming, necking up/down is fine but milling and machineing of brass is a little over my head. I guess in a nutshell I want something that is fun and interesting without too much a$$ pain. Thanks in advance for any and all inputs.