Re: .308" Accelerator Sabots?
Like any other hand load, it wi.l depend on what YOUR gun likes.
I think 4,000 feet per second is fast enough, 85% case capacity is a good amount of powder, and trhey list the OAL and seating depth numbers right on the reloading data on thier website.
Its just going to be trial and error.
If the factory ammo didnt shoot well for you, then maybe the 4,000 feet per second wont be a good benchmark to start the loading process at, but it is all I can think of as a definite safe starting point.
Good luck man.
Find what you like in life and reload for it.