Thanks for posting your findings Russ, that's all very interesting.

It would also be interesting to see how those variations in weight effect muzzle velocity and accuracy.

I use RWS Meisterkugeln 4.49mm 7.0grn pellets in my Steyr LP10 and have set the MV to 525fps as per recommendations. I haven't weighed any batches, and my shooting probably isn't good enough to see any difference with these and most of the other top brands

However, looking at your results, I will give the RWS R10's a go and compare them with the RWS Meisterkugeln over the chrono for variations in muzzle velocity.

As a footnote, many years ago I conducted some accuracy tests with my Original 75 and I found that H&N Hi-Speed consistently produced the tightest groups. Muzzle velocity with those pellets was an average of 606fps.