And ever since the dead pigeons and rabbits stopped complaining about the smaller diameter pellet, everyone realised that it is cheaper
Jokes aside, what Timmy said. At about 30 yards, it matters not whether it is .22 or .177, you will kill equally well. So then, it is down to which one can maintain a tighter group and which one is more forgiving with small ranging errors - .177 all the way.
Also, some Speedy Gonzalez quarry have been known to hear a .22 go off, pack their belongings neatly in their travel bags and make an orderly exit before the pellet gets to them. The .177 gets to them at about 200 feet/second quicker
