The .375 notch in the lug is the weak point. I believe the area streches over time shimming will help, but may open up again. I have tried several different ways to tighten this area up, I have welded the notch solid and remilled and hand fit only to find that it opens back up after 10 rounds or so. I finally, after all else had failed, built a solid hole, like the encore, I milled about an inch or so off the end of the lug and welded this peice in. Previously shooting over 700 rounds trying different things, the gun has NEVER shot like it does now the first three rounds were in the same hole the secret is this lock-up, or should I say locking-up squarely on the receiver and the same lock-up ever time. Seating depths, powder amounts, different primers, for the most part don't make much difference in group size, a good load ofcourse shoots better but it has never shot like it does now. I say it again, lock-up is everything.