I have hunted deer with a 357 and it is a capable deer cartridge from a 6 inch barrel out to 50 yards. There is no way I would use it at 100 yards,
So why are you handicapping yourself?
What happens when you only wound that animal and it takes of and the next time you catch up to the animal or see if when you have tracked it for acouple of hours it is standing up in a clearing 250 yards away
can you take the shot your are ethically obligated to and be sure of putting it out of your misery?