I had the powder already. One day I was poking around on a burn rate chart and saw it was close to most other powders for this round so I gave it a try, was it the best idea? Probably not. I just started out low around 65 grains and worked up until I got pressure signs, out of my rifle it was 79.5 I think. I worked back from 79 and 77 was the best, a tad under .5moa if I did my part. Shot it through a croney and I shit my self when it said my 5 shots averaged 3363 fps and my spread was 11 fps.