Depends on how they'll develop it. The box speed should be ignored; the real sped varies depending on the developer. Tri-X, for example, when developed to a normal level of contrast has a true speed of 320 in D-76, 200 in PMK, and 250 in Rodinal. These are not 'pulled' speeds...they're thereal speed of the film wen its is developed formally in the developers I listed.
I have less experience with HP5, but in D-76 it should be shot at 320.