I don't know of any 7/8 oz loads, but there are 3/4 oz loads with Solo 1000. Here is one from the Accurate Arms website:
AA Hull, 3/4 oz lead, W209 primer, WAA20 wad, 10.4 gr Solo 1000. There were also loads for the Remington STS and Federal hulls, but they required a .135 card.