Thank you. I did indeed read that thread. I was actually rather disappointed that guys were reporting results with 3" to 4" groups at 50 yards and expressing their satisfaction. I would not consider that acceptable accuracy from any brand-new rifle. Surely there are better loads to be found. It also seems like guys are coddling this gun, and perhaps thinking about it too closely to an original.
There's an article by Ken Kempa in Guns & Ammo Jan. 2010 in which he tests various smokeless handloads, mostly using Barnes jacketed soft points ranging from 300 to 450 grains, at velocities ranging from about 1,360 to 2,120 fps., and getting 50-yard groups ranging from 2.25" to 0.75". According to his calculations, none of these loads exceeds the recommended pressures for this gun or cartridge. Of course, he's evaluating this rifle for its potential as a serious hunting rifle (with high marks to it for that), rather than for CAS shooting. But if it can easily handle driving a 450-grain jacketed bullet at almost 1,600 fps, I don't see why some guys are getting so cautious about putting a few extra grains of Trail Boss or of 3F Swiss behind a 350-grain soft lead bullet.