Hmmmm, I always chime in on these 270 Win threads.
If the truth be known, I'm the world's least known expert on the 270 Win!
That is since O'Connor left the scene.
Truthfully though, and expert on only one 270 Win. The one I've had for 40+ years.
I loaded it with two distinct loads.
One for Predators, yotes and smaller
One for Deer and any thing larger.
Both loads worked great but the Deer and bigger load was a bit wimpy on a 70 yard moose. May as well shot him with an arrow.
Best primers are Non Mag. CCI-200s work best for me.
90 gr Bullet - 4835
130/140 class bullets - 4350/RL-22/Norma 205/MRP which is the same as RL-22 bit way less quality control from lot to lot.
Best bullets - 130 Sierra Boat Tail/130 Nosler Ballistic Tips/ 140 NABs, Bergers.
I loaded for the same model you mentioned with a 140 Berger and 7828ssc and got great accuracy. It took a nice cow elk at 80 yds. I didn't chrono the load.
Out of a 27" Lilja I expect 3200 FPS MV with 130s and 140s which is plenty sufficient for a 270 Winny.
The Sierra 90gr Hollow Point if my favorate yote and below load. I move it out at 3400 FPS and it drops like a cannon ball right at 420 yards. I've never hit a chuck, yote, ground squirrel over 420. At 419.5 they are DRT at 420 I just throw dirt on 'em.
With a 130/140 or even a 150 Ballistic Tip it should make one heck of a game getter.