Hopefully someone with more experience will post as Im pretty new to Dr Ashbys arrow standards.

My understanding is that the heavy bone threshold supercedes FOC. Go for the 650gr arrow first and then build in the FOC.

As for your question about the wrap, moot point as you arent at 650gr yet.

Shaft to ferrule ratio is a major factor in overall penetration. The ferrule should have a larger diameter than the shaft itself.

Maybe the Dr himself will explain more and talk about the Turbolator. I read about it but am focusing on 650gr and FOC >20%

Im shooting a 53# mildly reflexed BBI and set up some cedar shafts with the 225gr Tuffheads and am at 630 gr before sealing and glue and getting right around 24% FOC. We’ll see what it actually comes out to once all is said and done.

Loooking forward to hearing how the ash comes out. I havent used ash in awhile though I remember that if they werent sealed very well they liked to stay away from straight.