Ray, my first 270 was in the 80s, a 700 MR, it never shot 130s well. Rem goofed the muzzle/crown, and I had to get that fixed, lap lugs, bed stock, and it was floated when cured. THEN it would shoot, but MUCH better, putting 3 150 BTs into a nickel sized group time after time w/52.0 IMR4350. It would crater primers at book max load of 52.5 so I stopped at 52.
Later, a Ruger 1B showed the SAME preference, 150s over 130s. The 140 Hornady I believe was then the only .277 made, but now, with BTs and NABs, in 140, that would be my 'go to bullet' save perhaps elk/moose sized game or larger, then I might opt for the 150PT.
Currently running 150 BTs in another 270. The original owner had bought some 140 Extended Range IIRC, back in the 90s, and it seemed to shoot fairly well at 200 yds. So, yes, I echo your sentiment's on 140/150s in 270.
No doubt the 130s have and will continue doing a good job for a long time in 270s, but I feel they leave something on the table...so why not utilize the benefits, inc. often better accuracy.
