The .338 Remington Ultra Magnum is your best elk rifle of the two...

With the Federal 225g Nosler Accubond you have found your BEST elk load in this caliber!

Velocity:
Muzzle: 3020fps
100 yds: 2846fps
200 yds: 2678fps
300 yds: 2516fps
400 yds: 2360fps
500 yds: 2210fps

Energy:
Muzzle:4556ft/lbs
100 yds: 4045ft/lbs
200 yds: 3582ft/lbs
300 yds: 3163ft/lbs
400 yds: 2783ft/lbs
500 yds: 2440ft/lbs

Wind drift @ 10mph
Muzzle:0.0"
100 yds:0.5"
200 yds: 2.2"
300 yds: 5.0"
400 yds: 9.1"
500 yds: 14.9"

Trajectory:
Muzzle: ???
100 yds: +1.4"
200 yds: -0.0"
300 yds: -6.2"
400 yds: -17.9"
500 yds: -36.0"

With the .338 Remington Ultra Mag you can kill elk at distances far beyond where you should be taking a poke at them.