If I recall, there is no SAAMI specification for +P+ ammunition, it can be slightly more pressure than +P or it can be dangerously, wildly more pressure than +P.
What you're asking would seem to be if a manufacturer will commit to a concrete answer about something they have no control over and cannot reliably estimate.
What you're asking would seem to be if a manufacturer will commit to a concrete answer about something they have no control over and cannot reliably estimate.