The sabot ggauges worked better than a mic because the plastic is soft.

blackheel- The hornady 250sst with low drag is my go -to load ( cheap and shots well)with BH209 , groups under 2" and Ussualy under 1" MOA. I have shot it on 2 optimas,convertedTraditons L-bolt and converted CVA mag bolt. I haven't shot my Omega yet with BH209.