Nebs,There is a reason 700X is not on my list, it's because Hodgdon does not recommend it for 7/8 oz, at least for Rem hulls. When you go to their online data guide and select Rem hull and 7/8 oz., 700X is not a powder available for selection. Where did you get your 7/8 oz. 700X data?
PS: Because this thread jumped the shark, I broke this discussion off into a new thread. See the '"covering the waterfront" thread.
Hodgdon_IMR_Winchester Load Data-2015. For Remington hulls they list 24gr, 1 oz, and 1 1/8 oz. Only reason they don't list 7/8 oz is because 700X is an old powder, and since they already had existing 24 oz data, they didn't feel it was necessary.