I've done alot of searching on this cartridge over the last year, cause I had one built. Cept mine is an Ackley improved version. Just got it and haven't chrono'd anything yet, still in the neck turning, fireforming and loading process.
What I've been finding on the web is velocities anywhere from 2800 to 3150 with the 105-107 bullets. Popular powders seem to be R17 and R19, H 4350, VitaVouri N160 and N560. Some have also mentioned the 4895's and 4831's and Varget.
I've been seeing powder charges from 35 grains to 40 grains with most all above powders. Most info I've seen is with CCI primers.
Haven't heard anything bad about this cartridge.
Good Luck.