This sounds like an awesome build. Ive been thinking about a 14.5 custom barrel for a coyote rig. You’ll be happy with the Krieger. Mine shoots the Hornady 62 gr bthp, 69gr smk & tmk, 73 gr Bergers, 77 gr Nosler cc, smk, & tmk in tiny groups. I have some good barrels and my Krieger shoots more bullet/powder combos tighter than any other barrel I’ve ever owned. Franks work is top notch. I built a 20” rifle with a Bartlein he turned. It did not disappoint.