I've used both 8 twists and 7.5 with DTAC's. Go 7.5 to be sure as Eddy said. I get anywhere from 2,950 on the low end with a 24in barrel and H4350 to over 3,100fps in a 27in barrel. 3,000fps is what I would expect.
I only use H4350 or H1000 as I don't like tempature sensitivity.
They kill well and I agree 800 is a good stooping point for terminal ballistics.
