Yes, go to beyond556.com. There is a lot of info there.
I have a Beowulf and I have to say... it is absolutely awesome. I purchased mine from a member of this site actually. After some hardships with the stock (Ace Socom M4) I have it up and running again and I love it. Reports on recoil are that it's similar to a 12ga but I would compare it more to a 45-70 or maybe a 12ga shooting 3" turkey loads. Recoil is stout. There are a number of muzzle brakes on the market. I just installed a Millenium brake from Alexander Arms and it makes a huge difference. Recoil is more comparable now to a 243, which is awesome considering what's coming out of the barrel.
Ammunition can be difficult to find, it is often on backorder so if you don't reload you may have to wait for some. The cheap stuff is usually under $30 a box (20) but the brass is easily worth $0.50-$0.60 apiece. I have only handloaded for it. Brass seems to be the hardest thing to find but I have been able to get it. If you are not an experienced handloader, it is not the best cartridge to learn on. But there is a lot of info at beyond556 and those guys are willing to give advice.
Mine has been flawless so far although admittedly only ~100 rounds down the pipe. 350gr bullets have ran just fine is a number of standard AR mags without modification including Stoner, Pmags, D&H, and Colt.
It's accurate. I shot a 3 shot group yesterday at 100 yards that I bet measures ~1-1.25" before subtracting the half inch for bullet diameter.
The Beowulf hits hard. It's a whole lot of punch in the AR platform and brings a smile to my face with every shot. I can't wait to hunt it, bear season opens Friday and the Beowulf will be there. Hopefully I can tip one over
Here's a cell phone pic of my setup. It's all I have at the moment.