You really should not take too much notice of stated numbers here. I gave up worrying about head sizes ages ago. The pellets are light and small and in my experience the weight variation-on the very few occasions when I bother to weigh pellets-is always there. The concept of 'spurious accuracy' comes to mind here. Anyone on here who gives power ratings to 2 places of decimals i.e 11.47 ft lb is guilty of this. OK some members on here use laboratory scales to measure pellet weight but most of us use the widely available electronic variety which have not been independently tested. What I am in effect saying is 'don't bother with over analysing pellets.' Just find the make that suits your gun best and use them. I have found that pellet hardness (which comes from the antimony content of the lead mix) is more important in determining accuracy.
Any comparisons with your regime with centrefire ammunition does NOT translate into small light airgun pellets so my advice would be-don't waste your time worrying about it.
'It may be that your sole purpose in life is to serve as a warning to others'.