I happy to report that I now have put 5 boxes of hornady 400 gr DGX through my sabatti 450/400 and it is performing well. I have mounted a swarovski z6 1x6 on it and have zeroed at 35 yards. The LR spread appears to be consistly and inch and under. At 50 yards I put three consecutive right barrell shots in the bullseye with all of them touching each other. All of this shooting was done from a lead sled. the rifle continues to show some wear at various rub points but no fatigue. I am starting to wonder if all of the criticism is undeserved or if I just got lucky with a good version of a cheap rifle.