I have shot 200 rounds of this in my CZ457.
16.5" barrel, Dlask Linear comp.
It was a pretty windy day and I was shooting from a folding table rather than a bench but I was able to shoot about half of my groups MOA at 50.
Had a friend shoot it in his SAKO and he was about 1.5 MOA at 300 on a calm day.
My personal experience says that there are a few less than consistent rounds in there as I had nice groups going and then a flyer would show up.
I also thought they sounded hotter and their POI was 1/2-3/4" higher than the RWS Target Rifle and Eley Contact I normally shoot.
Website says 1066 and unfortunately I did not have a crono but I would call BS on that.
Hoping to crono some this weekend.
I also wasn't super happy with the lube used. I can normally switch between RWS, SK, Lapua, and Eley without really needing fouling rounds but it took 30 rounds to clear out whatever these leave behind.
I cant post pics but if you want some, you can PM me and I think I have some shots of my 5rd groups. I usually do take some.