My go to elk rifle is my Model 70 Featherweight in 270 Win. I use a Vortex 6X24, 18-24 power is good for checking out the critter but I like 8-10 power for shooting.
My go to bullet is the Hornady 150 IB, excellent long range hunting bullet. Pricy, but the 150 gr SST has the exact same BC, half the price for practice and long range plinking.
I have a box of the 145 ELD-X looks good on paper, but I havent tried it yet.
If you reload, since you have time, play with some RL 25 powder in your 270 Win w/150 gr bullets. I've found I get the best velocity and low Std Deviation, reasonable pressure and accuracy with this powder using Winchester Brass, Win LR Primes.
Well worth looking into. Good at banging steel at 1500 yards, More then enough remaining velocity and energy at resonable hunting ranges.
This young lady, hit at about 360 yards, went right down, all the way down the hill into the creek. The InterBonds work but I'm afraid Hornady backed off making them in favor of the 145 ELD-X.