Sorry but a decent FAC air is more versatile than .22lr and yes some slugs are taking the piss in price , 22lr ammo £12-13 per hundred I can buy 200 ZAN slugs delivered to my door for that , which are absolutely fantastic and H&N slug which are on par but £10 per 200 delivered . Yes the out lay is around £1600 compared to £600 for rimfire, but I use FAC air far more than my 22lr . I wouldn’t be shooting in trees with 22lr or anything past 100 yards
you need to go out with a decent FAC air for a day and see exactly what they can do . You never know you might see my point ?