Please keep us updated ! I’m in the same boat. I currently run the arc mags and am running them at 2.970 with is .020 off with 140 vld’s. Wyatt’s showed 2.990 for the prc box , the extra .020 would be niceFound some info on the hide where it’s been done. I ordered a Wyatt’s PRC box and my Smith is going to look it over and see if it can be done.