HW35 any good?

View attachment 288601Can someone explain to me this chronograph printout? Seems like the hw35 is not very consistent.
Beeman sent this test report with my R10 after doing a “super tune” back in 1998. Not sure exactly how to read this either. Is it 5 shots or 10 shots?
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Beeman sent this test report with my R10 after doing a “super tune” back in 1998. Not sure exactly how to read this either. Is it 5 shots or 10 shots?
View attachment 571577
im guessing here…
this was a 5 shot group

High was 972
low was 958
extreme spread was 14
average was 961
standard deviation was 5