Re: .25cal Elk Bullets
Just ran the ballistics for you and I would say the 110 AB is your best option, for a balance of BC and penetration. You are at around 1400ft/lbs of energy at 500, that's at sea level however, so if you keep your shots within 600yards, and put the bullet where it needs to go, that elk will die.
Just curious, why not go with a larger, more ballistically efficient cartridge?
"Out of range" is a theoretical concept as far as I'm concerned. Send it!