Brian, my apologies to you in advance as my response is useless to you
but I have 12 or 15 boxes of this stuff in my ammo cabinet.
As I am in Australia and posting/expiditing unaccompanied ammunition is verbotten, I cannot help you, sorry.
Also, this is my preferred ammo to loan clients in our buffalo camp who travel without a rifle.
This ammo, loaded with this bullet is about as good as it can get on buffalo from a .375, unfortunately it has become horrendously expensive to purchase in Aus with each box running over the $200 mark.
Suggestion, Barnes has a line of ammo out called Vortex.
The Vortex line is also loaded, I beleive, with the T.Shok range of slugs ?
Best of luck with your search.
Paul.