I shot off a few, was 1/2-3/4 moa out of my 338. good plinking rounds out of my rifle. I have yet to try to reload the brass, so I can't comment on that.
Jason Price of Atlas Tactical in Newport, VA used a Savage 111 Long Range Hunter in 338LM and the Sellier and Bellot ammo in question to hit our 1 mile target twice in a row.
The ammo performed very well at other stages earlier in the day.
Looks like pretty decent stuff. Not sure about the brass... I inherited the empty cases at the end of the day, but I've not volume tested them or done anything with them just yet.
I have been using them to break in my Savage 110 FCP HS Precision. Last tome at the range 2 out of 10 cases got stuck after firing and I had to manually push them out. I have never experienced this when shooting other rifles/calibers. I doubt I will be buying any more of this particular ammo. The differnce in price is very drastic when compared to other manufacturers. There must be a reason to this. I think it may be the brass.