x man on the valk forum has come up with some really good loads, though his build is also geared to pushing the COL's "out there." For the past year or so I had this crazy idea of drilling out tracks in the front of the magazine wall and into the barrel extension ramps to accommodate extra long cartridges but never did it, thinking it would be too much work and impractical. Low and behold--he had the same idea--but actually did it.
