I didn't chronograph these loads because I've swithched over to a magneto speed
chronograph that attaches to the barrel. I pick an accuracy node and then load duplicates to chronograph. I'll get a chance to do that and take the load out to 600 yards next month at Malabar.
I'm well aware of the short mags, but I still like the long ones, I also have a 300 H&H which is ancient but still out performs the 300 WSM