I just purchased a lower and am going to go the .223 Wylde route on the rest of the build. My plans are either a 18'' or 20'' barrel. I will mostly be shooting 55 to 62 grain bullets. I have been looking at possible twist rates of 1-9 or 1-8. There is a lot of different opinions out there. 1-8 seems like the route to go. However some people are getting better accuracy out of a 1-9. I will be shooting 99 % FMJ ammo. Anyone here experimented or have any insights?