I've never shot a .270 WSM, so can't really speak from experience, other than to say that either 130's or 140's are more than enough for anything you'll shoot in Texas, unless maybe you go after Bison or some of the very large exotics on a private hunting preserve. I'd just try a few loads, see which groups best out of my rifle, and then buy a few boxes of whichever one that is... As a point of reference, the last two years, I've used a .243 Win, with 100 gr. PSP Core Lokt's for Texas whitetails, and out of the 4 deer I've shot, only one has gone more than two steps after the shot. So, I'd expect your WSM will perform at least as well... Good luck!