Well I now have 3 range sessions with my Sig 516/Vortex 1-4 PST . It has run flawlessly though 900 rounds, mostly IMI 855 or Federal 855. I am now shooting both the Hornady Steel cased match 55grn and 75 and it is grouping at .75 MOA or better. I will probably sell my the Stag Model 3 I...