After replacing one of my regulator O-Rings which was defective out of the box, I installed a Vortex 2-7x32 Scope with BDC Reticle and Leupold 'Rifleman' high Rings. A few shots to zero and I can get a bullseye then place two or three follow-up shots into the same ragged hole from a benchrest. Now that's crazy accurate! Regulator is set at 148 bar (tip of gauge pointer just touching left side of 150 line) and I never charge over 200 bar. Very nice target rifle but would probably make awesome critter headshots as well. I'm running my .30 barrel, haven't tried the .25 barrel I have yet.