Phil Shoemaker killed a big Alaskan Brownie at a few feet with a 9mm and some Buffalo Bore 147 grain hardcast in Alaska a few years back, while guiding some fishing clients. While neither a 9mm nor .45 ACP would be my first choice, if you put some stout Hard Cast loads in your .45 it will do...
the 7 WBY is certainly a good cartridge. As people keep mentioning, it's the barrel twist rate and cost of ammo that keeps me away from it. I went 7 RM and also have a 28 Nosler, so the 7 WBY never filled a niche for me. Furthermore, I understand if you slap a 26" barrel on the 7 RM and max...
Yes, i understand physics. But, when it comes to large (and especially dangerous game) there is more at play than simply foot pounds of energy. I trust the words of people who hunt dangerous game regularly, e.g. Craig Boddington & Phil Shoemaker (to name a couple), and wider heavier bullets at...
For the ranges you're discussing (up to ~400 yards), i'd recommend the 30-06 or the 7mm Remington Mag. I have both, 7mmRM will reach out further with more kinetic energy, however the 30-06 shoots wider / heavier bullets for large game at closer range (think Taylor KO factor). Past 400 yards...