I'm at 74.5 grains of R22 over a Rem 9 1/2 primer and under the 165 TTSX in a Kimber 8400. That's 1/2 grain under Barnes #4 max for that bullet, and 5 grains under Lyman 50th with a 165 "jacketed bullet". I have no idea how I'm getting 3,200 fps out of this combo: I'd have thought I needed more powder to get there.
Anyway, with no pressure signs & excellent accuracy, I feel no need to push for more in this rifle. It's going goat hunting with me in October.
I'd blame my chronograph, but the readings have been consistent in several different light conditions. FWIW, the same chrony has shown many factory loads in other rifles to be far slower than what the box claims. Perhaps either my chrony is a contrarian, or it just delights casting aside my assumptions.
FC
