Hodgdon's new reloading data website is interesting. You can select rifle, pistol, or shotgun. Then you can select the powder maker and powder to see what they tested it for. You see 700 X is in the powder selection for rifle cartridges but not 800 X.

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If you refine it a little and select the powder you want to use, the program will list the cartridges it's been approved in.

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Under rifle cartridges, they don't approve it for much.

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If you go to their website and plug in 800 X under the pistol data you fine want they think of it. You may have your opinion and I respect that, but I have mine.