Weihrauch HW100T .22 ...

That's looking better Andy - well done!

Yes, I was thinking that, and the others you sent, I actually had a go at weighing a sample of the pellets, (the AA DF's) Never done it before and sorted them. Unfortunately, I'd used up the sorted ones before I discovered the slightly loose bolts. An exercise for another day maybe, although, (I don't really know) but perhaps the differing weights were so minimal as to not influence the outcome, I bow to the more knowledgeable here 
See image for results.

Well, it's a breezy day today, but Kruzroad, kindly sent me some pills to try.
She, (HW100T) liked the AA Diablo fields (thanks Dave & Kruzroad))

And had a Doh! moment, during testing I was still having issues... UNTIL!, I got an Allen key and tightened up the Allen bolts at the base of the stock, not too loose but just enough though.
That seemed to improve things a bit, as I said fair cross winds but an improvement (I think)
The image is before and after tightening the bolts.. (One 14-round mag each of the AA Diablo's).

Hi Andy,
Would you be interested in a swap?
I’ve got a lovely Air Arms S510 in .25 cal manufactured in Sep 2020, so it’s less then 4 years old, still got that new rifle feel to the cocking lever 👌🏻
3 magazines and an Air Arms Q-tec silencer.
It is the XS, extra version which means full length and full power, has 5 power settings on the transfer port, they are roughly 2.8FPE, 15.2FPE, 28FPE, 38FPE and 41FPE. Has the super lite stock, usual AA quality.

I love Air Arms, especially the S510s, and normally I wouldn’t consider getting rid of this lovely rifle, but I used to have an HW100 and I loved that rifle even more 🙈
I cry when I think about why I had to sell it 🙈🙈🙈
And I’d love another one.

It’s the bottom rifle in the picture below, although that is not the QTec silencer that is on there in the pic.
And as per your add, scope not included… 😂

I'll get onto it shortly Andy. I'll send up some cometa exact as well. Do you want any field target trophy at 14.66gr.
Both the tx and weihrauch have liked them. Though I think it's more my shooting a new gun and the pellet is faster leaving the barrel. I ended up AA 16gr for the tx and will hopefully end up back on 16gr for weihrauch.
I've never liked shooting the 18gr personally.