I just picked up my 858 today. went to an indoor range as it was dark when I got it. I couldn't use my czech ammo because they said it was steel cored. Anyways, I bought two boxes of American Eagle 124 gr FMJ stuff to test the thing out on.
The range was only 50m so I will have to do more testing later. First group was decent 2- 3", and a little high.
The next four groups were decent as well, but they were 10 shot groups, and way high (again about 2-3" group size).
The final group was done carefully, as they were my last 5 rounds. this group was about 1-1.5", with one flyer, which can most likley be attributed to me, as I can't shoot for ####. I also aimed low, as I want to sight the thing in at 100 m.
I do have pics on my camera, but I am searching high and low for my ####in USB cord. Also, this ammo was 14.95$/box of 20, and I can't say for sure how good this thing will shoot with my czech m43 (that has a bxn # of 65)
For the price, and with the extras it comes with, this thing easily out performs my sks in every category (my sks was a D model with a folding stock that wobbled so much I couldn't even hit the ground at 10 yards with the ####ing thing).
I also took some pics of it beside my 16" AR and my 18" bbl Mossy 500 Mariner. I will post the pics ASAP.