Not sure how much you have read up on the .270 Winchester, but there does exits one handload that is considered the "gold standard" to test any .270 Win's accuracy.
According to outdoor writer Jim Carmichael, that load is a 130 grain projectile, over 60 grains of H4831 powder, and a large rifle primer. I personally went the extra step and used Federal 210 bench rest primers. I know...crazy.
For the best projectiles (manufacturing consistency), Sierra has the best controls over manufacture, unless you really want to lay out some serious coin for higher grade, custom target projectiles. I would like to try and split the difference one of these days and test the 135 grain Sierra MatchKing projectiles for accuracy loads. Also, check Sierra's GameKing and ProHunter projectiles. These hit like sledgehammers.
Oh yeah, how could I forget...Lordy, test some Speer HotCores. I used to buy Speer 90 grain HPs for varmint, and Speer 100 grain HotCores for varmints. In these weights, the .270 Win is capable of some speeds that will shock you!
You never, never, never should get me started taking the .270 Winchester. It's just plain a fun round. Again, JMHO. Oh yeah, and I had custom reloading dies made for mine, neck re-size only. Okay, now I'm really finished and will shut my trap.
Doc2005