Sorry to rain on your fire so early on in the proceedings matey, but I've never shot a groupings test, and never will, because it means absolute squat when your face down in the dirt taking on moving targets. What I believe is important is weapon familiarity. I haven't changed the set up of my rifle for nearly 3 years now, and that was only when I changed the hop bucking, and a month ago to lower the power to 350fps, but I know that I can hit a man sized target out to 250 yards using my 500fps set up, that is all that counts. As I've covered in other topics, after 50 yards there are so many other variables at work on the BB that past that point everything else is knowing and understanding how YOUR rifle fires, yes to a degree this can be learnt firing at targets in your back garden from a reasonably supported position, but then place you and said target in an unknown environment, with unpredictable atmospherics, at roughly the same distance and move said target approximately 3/5 feet for every shot you take and you begin to see what I'm getting at 
In short there is no substitute for getting your arse in the grass if you want to learn how to shoot your rifle accurately
Just my 2p, if anyone wants to post their groupings, please carry on
In short there is no substitute for getting your arse in the grass if you want to learn how to shoot your rifle accurately
Just my 2p, if anyone wants to post their groupings, please carry on
