The only case that had soot on the shoulder was the one with the lighter dimple on the primer,and it had a little soot ring on the shoulder, and the rest just had a little on the necks,about what I would expect with a pretty light 414 load.The brass was some R.P once fired that I bought from a guy on the HighRoad forum a few years ago,and never used it.I can't remember if it was sized,and decapped when I bought it,but I think it was.I did pick up some Winchester standard large rifle primers today,and I am going to keep my die about .015" off the shell holder while sizing.I am 99% sure the problem was with the sizing,but I am also switching primers to cover as many bases as I can.