Just to be contrarian, I just finished an article in the latest African Hunter magazine where author Terry Wieland related his hand loading experience with a lovely, Al Biesen custom 270 and his "never fail" 130r 270 load consisting of 59.5gr of H-4831 (he also stated H-4831 was the traditional "go to" powder in the 270). His results with three bullets (five shot groups) were as follows
Sierra 130gr- 1.1"
Swift Scirocco- 1.2"
Nosler Partition- 3"
Personally, Partitions have always shot well for me, but never the accuracy consistency I've gotten from TTSXs across calibers from the 257 Weatherby to the 338 WM.
Went out this morning to try out Wieland's observation with my tried and true load of 56r H-4350 F 210 primers and WW cases:
180gr Hornady Spire Points (MV ~2700 fps: