Went out tonight and shot the 6br at 700 yards. I'm really happy with this group even though the one shot was way high and left.
I would be more worried about that shot "low and right"
When testing for F class at LR, I use a digi camcorder. Let's me see the group form real time on a LCD monitor AND tapes the group. With notes, you can correlate what is happening with the air AND the gun.
This is a 300m group I shot with my FTR rig with my Raton, NM load. This was to confirm my load tuning and accuracy after alot of shooting. The 2nd shot was a missed wind call. Shot 4 was aimed lower to confirm vertical - shot went where I aimed. Keep the video file and your target and notes. Now you can replay and understand what was happening instead of a bunch of holes in a target. {video sped up but you can still hear the wind blowing}
Although the entire group is still nice, knowing where each shot went really tells you more about what was actually happening. Maybe one shot was out due to wind or you called a pulled shot upon release. Maybe really didn't go where you were expecting despite a good shoot release. I find viewing the group critical to understanding and correcting my load tuning - you can do the same thing with a spotting scope at shorter distance. just mark each shot on a target and note anything wonky.
After sending dozens of rds downrange, you aren't likely to remember what where and why. Now you have a perfectly good load with an "out" and you dismiss that load forgetting that you did heave the trigger or had bad form or you saw the wind gust through on that shot.
At LR, it is rare to get picture perfect groups unless you are good at reading the wind and have proper wind indicators. So understanding where the core of the group is vs the 'outs' that might be condition related can help narrow down best loads quicker.
Repeating the results is critical and here shooting for score on a marked target tells the real truth.
Jerry