I use Solo 1000 with 7/8 oz with good results. Even better is that with the right wads one can load these at close to 1200 fps and around 6000 PSI. I do get an annoying plastic buildup from the Claybuster wads but for 6000 PSI I'll put up with it! Oh, I of course load low pressure for use in older guns.

Check the Accurate Powder website to download their loading data:

http://www.accuratepowder.com/data/1000.htm

For that matter, check any manufacturer's website for their loading data!

USMC Retired