Going through all the responses concerning the comparison of various brands & weights of AR & AP pellets - It only reaffirms the universal opinion that - "No two ARs / APs perform similarly!
One can go through posts made by experts in ARs / APs in international forums that validate this premise
Air Arms are peculiar mechanisms each behaving in a way only peculiar to them - experts till date have no conclusive opinion on this!
However in my considered opinion the reason may be the "Breech Size" - in 0.22 cal some ARs come with 5.5mm ID & others 5.56mm - The former being the followers of the German Metric System & the latter the British system which converts 0.22 to 5.56mm. This tiny difference could be the culprit in terms of fitment of the pellet in the breech.
Some one once told me that German made pellets work well in German made ARs!!! While the same pellets perform a tad differently in British made ARs!!!
This opens the discussion on what dimensions do pellet manufacturers observe while making them? Interesting eh?!!!
I own 3 ARs all in 0.22cal-
1. A super tuned IHP35
2. An ORION made by Precihole Sports
3. A Custom made 'Turboshot'
All of these give excellent results with Mastershot Wad Cutters (14gr) & with 15.2gr round heads which are under development. The same is the case with RWS Super HP in 14gr. While other brands locally available (14gr) in different shapes stand no patch.
I've decided to stick to MS Wad Cutters & 15.2gr RHs & enjoy my shooting
In fact that's what international Gurus say - Stick to the pellet that performs well in your AR & Enjoy your shooting
Briha