I advise against using Hi-Skor 700x or 800x while it does give higher velocity it meters terribly. I still have most of a can of 800x from 4 years ago. I save it for when I have nothing else available. The last thing I want to do is hand weigh each charge for hand gun ammo.
No matter how many times you do it and nothing happens it only takes something going wrong one time to kill you.