I shot my 6br CBI barrel which I got last week, but I put it on right bolt left port target action, so far at 300 yards it grouped 0.75" 0.8" and @ 100 I had one group 0.098" few 0.1" and many 0.2's still working on load for it, but surely it likes 95gr target VLD, 105 gr A-Max and 105 gr Barnes MB. If you planning to use 87gr V-Max you can skip them, best I got using those 0.5"@100