Considering it has not been on shelves in 6-8 months, if you want it, you better buy it.
I have used it in several big cased rifles. 6.5-.300 Wby, 7RM, 7RUM, 28 Nosler, .300WM. I use it in my personal 28 Nosler as well. I have not tried it in any of the medium sized magnums or short action magnums however.