I strongly recommend against a WC .458 SOCOM barrel. It is not a legit reamer (reverse engineered).
MUCH BETTER OPTIONS/companies if you seek that caliber...
Our chamber is the one that will work with new production unsized Starline cases. P, T & G worked with us to optimize the chamber. Current production cases are larger than Marty's original chamber in a couple areas.
My bitch has always been that Wilson Combat took Marty .458 SOCOM design AND NAME... and built the chamberings WITHOUT Marty's approval.
IF WC had built a modified variation and called it .458 Wilson Combat (or whatever)... I would never have raised the topic here or on .458 Socom Forums.
Not questioning if they shoot well... or if your nuance changes helped/hurt... moreover the lack of respect I see for Marty.