I just finished loading some .270 ammo and I was using 60 grains of H-4831 with 130 grain Nosler Partitions. O'Connor used 62 grains. I've heard that some think his scale was off (I doubt that) and I've heard that H-4831 has changed over the years (which I don't doubt). But what I'm wondering is if anyone still uses the old 62 grain load?
