The 270 Win was what I learned on for long range and know it well. I ran the 135 Sierra Matchkings. It's a very good bullet with a decent BC. The Berger VLD's would be tops for high BC in the 270. But they are a little more expensive. If you wanted to keep bullet costs down, a 140 or 150 grain Hornady SST would also be good. They shoot very well and have a good BC for a hunting bullet. If you were going to shoot 500-600 yards or less, a good boat tail soft point would work well. Sierra makes a 140 and 150 grain SPBT, and Hornady has the 140 BTSP. The only issue with a soft point is the difference/deformation in the tip will cause a varying BC, which can/will effect your trajectory beyond 600 yards. I'd lean towards the Berger VLD, then 135 SMK and Hornady SST's. If you were going to keep is less than 600 yards, a SPBT would be fine. The main thing would be to work up a good load that shoots well at 100 and beyond.
Also, seat the bullet out long to gain in accuracy and powder capacity. If recoil was an issue, then dial your load down some. I ran the 135 SMK at 2900 with IMR4350 for many rounds.