From Barnes website:
"3. Where do I seat the Triple-Shock, Tipped TSX and LRX bullets?
Answer. We recommend seating these bullets .050″ off the lands {rifling} of your rifle. This length can be determined by using a “Stoney Point Gauge” or other methods. You do not have to seat the bullet at, or on one of the cannelure rings."
I have some seated over .070" off the lands in order to fit the magazine and they still shoot 1/2" groups. I can't complain about that.
If Norma ammo shoots as well as Barnes Vor-TX does in my 300WM, 30-06 and 375 H&H, I'll be using Norma as well as Barnes. Hard to justify reloading when the factory stuff does so well.