It's an LSS Limited Edition with a laminated wood stock:



And, yes, it is the windage rear base (yeah, I know... now). The rings are the Posi-Align rings. I have the rifle apart now. Took the scope out of the rings and the base screws are tight and not bottomed out.

One other thing that I noticed was that there was a lot of blackening around the necks and front of the shoulders, like the pressure wasn't high enough to expand the brass enough to get a tight seal before the bullet cleared the neck. The brass is fireformed to the chamber and only necksized, so this blackening only goes to the front of the shoulder, but not to the case body behind the shoulder.

I would think that RL-22 would be a little on the fast side for the heavies in a case as big as the 257 Wby. 70 grains of Retumbo doesn't even fill the cases up to the bottom of the body/shoulder junction (but it's close). I'm also wondering about plaing with seating depth. The mag well is long enough to accommodate the big 3.6"+ COAL cartridges, so the 257 Wby has plenty of room, and then there's the very obvious and generous freebore shared by all factory Wby chambers.

I like it so much better when the load just works. Too bad I can't get any 7828 locally. I think that I'll try running the Retumbo a little hotter and see what happens. Seems a waste to have such a big case just to shoot a 100 grain pill.