It is the 50 HBR stock modified for the huge barrel block and it has lead added also.
In all reality, this rifle tracks like a dream. It is so steady on the bags that you don't even really have to worry about the bubble level once you get it level the first time. Even in a 35 mph wind (which we have tried to shoot in) the rifle won't even vibrate. This is soooo important because at 2k, if you aren't totally solid, you can see the crosshair cover 10 feet of ground on slight pre-firing movement that would only move a regular bench gun a little bit at 1k.
At first I thought that this rifle could weigh 30 pounds and just have a brake instead of weighing 52 pounds, but now I am glad that it weighs so much. I really think accurate 2k shooting must be done with a rifle somewhere in this weight class. I have shot a half dozen 50 BMG's in the 30 pound weights and they just are a little harder to keep absolutely still (before and AFTER recoil /ubbthreads/images/graemlins/wink.gif) at 1 mile plus.
I would recommend the 40-60 pounds for your rig, but 80 pounds would be a little overkill for a .338. It would be great on a 408 chey tac though. /ubbthreads/images/graemlins/wink.gif
One thing you must also get that is as important as the gun is the rest. The pedestals are good, but don't hold the rifle against recoil and with a super long barrel (34" plus) this is a problem because the bullet hasn't left the barrel before the rifle recoils back. This results in vertical stringing often called "magnum shot". This effect was witnessed with the MOAG and it was actually quite severe. At 2k, one out of every 6 or 7 shots would go 2-3 minutes high for no other reason. So I would recommend a one piece rest with a recoil strap around the butt of the rifle or a muzzle brake or both.
Hope this helps.
