Hit the range today with my freshly installed Proof research barrel (thanks Shaun). Disclaimer: shot at 40 yards at Pheonix Range, no rear rest, rubber block front rest. Not every pull was perfect, more than a couple errors on my part. I'm sure this makes all the data worthless but I am more than happy, plus it was a lot of fun. I tried to focus on ammo meant for this type of platform but had 10 rounds of Norma match left in the safe so it snuck in there. Can't wait to stretch the legs at some distance, the balance was substantially improved with the carbon fibre barrel. It's definely lighter, after 20 or so rounds I went to the gun counter and grabbed myself an enhanced rubber butt pad for the UBR.
Targets are 1" square graph paper.
5 round groups except the single group which was 10rds, moderate pace, no cool down between shots, couple minutes between groups.
Ammo used:
Hornady Black 155 and 168gr AMAX
Norma BTHP Match 168gr
Federal Fusion MSR 150gr
168gr A-Max and IMR 4895 S&B primers handloads loaded for old barrel, will be starting a new workup as they were a little hot in the new barrel.
In my estimation the 155 gr Hornady Black was the best shooter and would be worth trying if you are looking for factory ammo ($37-box).