The factory ammo is hot in a gas gun. He uses the JP high pressure bolt,SLR adjustable gas block and different buffer and spring combos. I have occasional swipes but no blown primers or blow by. 140s is what he suggested using with H4350 powder. I did the load development and shared what I found.
And yes, the scope has the TMR reticle with illumination. It wasn't cheap, but it was cheaper than a S&B. Buy once, cry once!
This is a 12.5" 6.8 he build for me
Cull buck he shot off my place this year with a 308