Good company, I emailed them about an order and they tried calling me back. Missed the call but they tried. Anyway, I swapped rails on a Sionics upper and it had the same POI after reinstalling the barrel (it was snug but not gucci aerospace tolerances).

Heres a 100 yd sample from their medium profile. 62gr 223 hornady black, I believe they use 5.56 chambers on their barrels though