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I wouldn't lose sleep over it, Dom.
The new figures are not only adjusted for CUP versus PSI but are also likely adjusted for the oldest rifle in that round. Assuming yours is a new or newish rifle, it's stronger than the old ones.
Dutchboy's advice is good. Match the velocity and you'll be matching the pressure (assuming the components are the same as the book's).
I never recommend using OLD reloading data - components DO change - but using recent data is probably fine even if it isn't the newest. Again, that assumes a newish gun.
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