For a bolt gun there are some really good, non-rimmed choices that are NOT way more gun than needed. The 458x2 (equivalent to a non-rimmed 45-70), a downloaded 458 Win, 460 A Square Short, the 450 Marlin as well as the new 350 Win Legend round are all worth looking at. I do not care for rimmed cartridges in a bolt. Lever or single shot they are great. They don't feed well and ejection can be spotty in a bolt. It also isn't nescessary when there are so many better choices as well as far wider bullet selections.