I can provide a little range update for my trip the range with some test rounds using IMR 4831 and the TTSX 100 gr bullet from Barnes. I used the CCi 250 LRM primer. OAL was 3.17 inches. I loaded 63gr, 64 gr, 65 gr 65.5 gr and 66 grain. I chose these loads because most research I have done shows the best loads at 1.5 to 2 grains over book max and I wanted to work up to that range. I stopped there because I only had 15 rounds of brass ready. The Barnes Load Data had max loading at 64 grains for 3842 fps. I do not have a chronograph.
Loads 63gr, 64 gr and 65 grain all shot to the same poi roughly and were all submoa. 65.5 and 66 shot to a poi of 1.5" higher and the groups widened to about 1.5 MOA. I did not see any pressure signs with any of the charges.
63 gr was 0.81", 64 gr was 0.66" and 65 gr was 0.48". There is a giant asterisk around 65 gr because it was only 2 shots who grouped just liked previous charges and in the same spot. The third shot was distracted as some paper on the back stop blew in front of my target just as I was releasing....
65.5 gr shot to 1.61" and 66gr shot to 1.58".
My plan is to load to the 64 gr book max, in the center of a 2 grain window that all shoots similar. At 3500 fps, it should be enough of the good stuff to work reliably.
Rifle is a Weatherby Accuguard. Hopefully these same rounds will shoot great in my CLR when I get it back from Melvin soon.
