The IMR Handloader's Guide has any number of low pressure 24 gram loads, which for all practical purposes are the equivilent of 7/8 oz. Right out of the book is Fed. GM Hull, 16 grains of 700-X, Fed. SO wad, @ 1160fps and 5500 psi. I personally load about 15.8 grains, with the Claybuster equivilent of the Fed SO, and am relatively confident I'm at about 5000psi or thereabouts. The book says to insert a 1/8" 20ga. nitro card in the bottom of the wad to take up space.
Please understand this is the load I use, which is out of the IMR book, but I am not recommending its use--just providing some info for you to make your own decision. You can also go to the Reloading Center on the Hodgdon website and see all these loads listed, as well as others.
