I had some of that 150 gr WW PP 270 WSM factory ammo and a new Savage 12 (BV something). The initial bolt lift was very high. My dealer sent the rifle and ammo to Savage and all they did was to shoot it with Federal ammo and say it was ok.
I recall that the velocity, over a Oehler 35P, was higher than the listed factory load for the 270 Weatherby. It was something like 3350 fps.
Very interesting! IIRC, the ammo I had problems with were PP loads as well.
I did not chrono those 150 gr WSM factory loads, as I quit after firing only 2 rounds. I wasn't about to chance blowing my face off.
