Never tried F, but it's funny that in that link it says in yellow highlight; Not for use in airguns"
My guess is they are neither very round or consistent in dia so I might try a few if I already had them, but I would never buy them for that.
I've used H&N 177 lead BB's and they seemed to fit and work ok, but I don't see how they could compare to a pellet. But those were H&N which still aren't round enough to be accurate, Gamo generally sucks so I imagine you're are even worse.
Plus there's your gun, bore diameter varies with cheap guns so your gun might not be happy with those but others might. If the gun is a springer then it's not a good idea imo to shoot things that don't seal well. Balls that do seal well would have excess friction so that "might" drop power enough to be annoying? Also, that F shot is likely has antimony which makes them hard, which is great for shotguns but the opposite for airguns by making more friction and energy needed to force into the rifling.
I mostly shoot JSB round nose pellets, best all-around performance period imo, but I do understand and partake in experimenting and general goofing off so I get it if you're just playing around. That's why I bought the H&N rounds, but being kinda useless is why I still have the 20+yr old tin of them with most remaining.
