I'd be surprised if Federal gave out any pressure information on their shotshell loads. B & P is one of the few major companies I've had any luck with, when requesting pressures.
I use Tom Armbrust to test shotshell pressures, and he also provides the velocity of each load with calculations of the standard deviation and average velocity, which may be more than you want to know. Send him five or six shells, but you'd better do it quick because he shuts down during the winter months and doesn't start back testing until spring. The cost last time I sent some was $5 per shot.
Tom Armbrust, Ballistic Research, 1108 W. May Avenue, McHenry, IL 60050-8918, phone: 815.385.0037.
Gene, two years old is NOT "old age" for shells!