Nosler lists a max of 63 grains of Reloader 22 and the 160 Accubond. I ran that tonight in a factory SPS with a 26" tube and CCI-250s. I got a pathetic 2789 average. And this is with a Magneto Speed chrony with is spot on.
I realize the books are a "guide"....but 3 grains is a schitt ton over isn't it?
