I tried out a load in my new Kimber Police Tactical in .300 Win mag on Sunday. I did some barrel break-in a couple of weeks ago and shot some factory ammo and a couple of handloads my buddy nwdan had around about a week ago and was less than impressed as the groups were all 1 - 1.5 inches. For Sunday I loaded up some rounds with RL 22 and 200 Grain Accubonds in .3 grain increments from 71.5 - 73.0 grains and the results are as follows. All are 3 shot groups measured center to center at 100 yards off the tailgate of my Toyota and sandbags with some gusty wind mostly from 6 o'clock.
71.5 gr 0.964" with two through the same hole
71.8 gr 1.038"
72.1 gr 0.176" pictured below
72.4 gr 0.212" pictured below
72.7 gr 1.205"
73.0 gr 0.877"
I think I found the sweet spot! Hopefully we can get out and chronograph it in the next week or so.