Dr B wrote:No regulator data I have ever seen beats that variation for these rifles.
If I can refer you to another somewhat parallel thread viewtopic.php?f=15&t=2942&start=10#p29243 My last chrono session with the .177 classic gave a 20 shot string with no power curve and like yours a variation of 3 fps. It's only 20 shots (I was just checking power levels) but I would like to think that the other 115 shots would show similar variances and I have no reason to doubt it. It has certainly improved on my initial graph now that it has had a few shots through it
I notice your rifles are in .22 calibre. My own .22 carbine is not regged and has similar figures to your own (that's why I haven't regulated it) and I am lead to believe that the .22 flavoured guns have flatter power curves and better shot to shot consistency.
Nobody is forcing anyone down the regulator route. This thread was to show my own findings as info on results can be hard to find. If your .22 is anything like mine then I would not bother regulating it. .177s to me seem to be a different animal though.