[IndispensableDestiny]

My first problem with this is the twist rate, really 1-7! A 1-7 will not stabilize 55 grain rounds worth a chit, that twist is for 60+ grain rounds.

Nonsense. Try this this link for advice from a ballistician:

Understanding Twist: Bullet Stabilization

The reason the military settled on a 1:7 twist is to stabilize the M856 tracer. It's about the same length as a 80 grain BTHP.

[Dusty Road]

Obviously your so called ballistician hasn’t seen a 55 grain pill moving at 4000 fps go up in a cloud of gray dust trying to push it down a 1-7 twist. I’ve seen them shear the jackets off!