I have a 22 inch Winchester Model 88 in .308


These two ammunition choices shot the best in my rifle which would be the best choice for Elk or is it a case of both being essentially the same for the purpose. Others have suggested moving up to 165gr but I would have to sight in the rifle again.

Federal 308 Winchester 150 Grain Soft Point

The Power-Shok bullet is built with an exclusive hot core process that eliminates the lead oxide layer that can cause core slippage. In addition the unique jacket profile and fluted tip ensures reliable expansion over a wide velocity range. An excellent all around choice for medium to large game.

SPECIFICATIONS:
Mfg Item Num: 308A
Caliber :308 Winchester
Bullet Type :Soft Point
Bullet Weight :150 GR
Muzzle Energy :2650 ft lbs
Muzzle Velocity :2820 fps

or

Federal 308 Winchester 150 Grain Barnes Triple Shock X-Bullet

Option for medium to large game. Vital-Shok is available in the world's finest big game bullets, from the unrivaled Speer Trophy Bonded Bear Claw and Nosler's latest offerings to Sierra and Barnes. Match that with world class brass, select powders and legendary primers and you get unmatched premium performance.

SPECIFICATIONS:
Mfg Item Num: P308V
Caliber :308 Winchester
Bullet Type :Barnes Triple Shock X-Bullet
Bullet Weight :150 GR
Muzzle Energy :2650 ft lbs
Muzzle Velocity :2820 fps