I generally follow the Barnes suggestion, and started with them .05 off the lands. Generally, they shoot well there, or seated a little deeper.
The "problem: (if it can be called that) is that Barnes TSX's, of whatever kind, can also shoot more accurately when seated very close to the lands. In my experience this depends on whether the rifle is a typical factory job, where the chamber may or may not be perfectly centered, or whether it's a custom rifle, where the chamber IS perfectly centered. This means the rear of each land begins the same distance in front of the chamber, so the bullet isn't tilted slightly by the lands on one side being longer than the other.
While in general TSXs (whether tipped, or LRXs, or whatever) do shoot more accurately when seated a little deeper than most lead-cored bullets. But that does NOT mean they always do.
+1
