Yeah, I had a great time too, good to shoot with you and the guys again. Maybe next time we'll get some more of the tree trimmed off in front of the 660 yard deer target.
It's a "body die", use it to push the shoulder back a thousanths or two. There's a picture of one in this link, you can get them seperate.
The scope on the 40X repeater was a NightForce 5.5 x 22 (I believe it's a 56mm objective model) with the NPR2 reticle.
For my single shot 40X I have three barrels, they can be interchanged with a barrel vice (very easy). I had Clay Spencer make up the three barrels (two in 6BR, one fast twist (8-1) and one slow twist (14-1) plus the required 308 Win barrel). I don't need to worry about the bedding or anything as the barrels are all the same contour so they fit.