Honestly, buy a box of several different options that you are interested in, and head to the gun range. Shoot them and see how well each one does. Pick the most accurate one and go back to the same store and buy more of that ammo with the same lot number. This way you know it will shoot well. Get enough to last you as long as you plan to shoot this load.
Best advice you can get-Dont just shoot the same ammo, shoot the same lot as they can change from lot to lot.
For the .270win I have tested everything under the sun as well as hand loaded every load I can find and heres what I have found.
1. For big bodied deer and hogs I prefer the 140gr. bullets, you get that much more energy transfer and penetration without loosing trajectory.
2. Faster doesnt always mean better, when hand loading I found that when I backed off a full grain or ever 2 from max I got the best accuracy as well as on game performance.
My all time favorite, all around load for the .270win is
140gr. Nosler Accubond loaded with RE22/1 full gr under max.
You can get this performance from 2 different factory loads
1. Federal premium loads a 140gr accubond
http://www.midwayusa.com/product/332779/...ubond-box-of-202. Winchester loads the 140gr accubond NOTE: not to be confused with the Silver tips..do not care for them.
http://www.midwayusa.com/product/310437/...ubond-box-of-20Runner up would be Hornady 140gr BTSP I have used both the factory loads and hand loaded these bullets for practice and huntings. They are not bonded so I have had them not penetrate at close range (inside 50yds) but everything ive shot inside 50yds with them has dropped dead.
http://www.midwayusa.com/product/530764/...-tail-box-of-20Winchester Power Max bonded 130gr cost a little less than the Hornady 140gr BTSP, but you can get them at Wal mart and I have seen the Power max perform well also on deer and hogs.
http://www.midwayusa.com/product/912768/...point-box-of-20I would buy 1 box each of
Powermax 130gr.
Hornady 140gr. BTSP
Federal 140gr. Accubond
One of these will shoot well in your gun and after you find out which shoots best you can sight in and use the other for practice.
When you find what works though, do your self a favor and
BUY A CASE OF IT! Put the boxes in a 50cal ammo can with a good seal and stick them at the back of the closet or safe.....dont be the guy that gets invited on a last minute hunting trip and has no ammo.