If you want to see some exceptional accuracy do away with all that freebore and you will get an additional 200+ fps: find a gunsmith or Use Pac Nor barrel and let them do the chamber.
I had two with zero freebore and the 100's shot groups in the low 3's at 3800 fps with the 100's. Pac Nor 3 grooves are what I had and they are sure accurate and fast.
