20 Calibre saves a lot of hassle discuss

[Muskett]

I'm with gsxman on this discussion.

The .20 is a compromise. It isn't as flat shooting as a .177, nor has the wallop of the .22. It limits maximising advantages of prioritising either velocity or weight; just gets stuck in the middle somewhere.

So what is the point? Because they are fun, and just something different to try. If velocity doesn't really matter much, nor weight, then not a bad choice. Still have to sort out the ballistic drop and everything else required.
Limited pellet choice might not allow for much tweaking to get the absolutely best that can be had unless just lucky.

If hitting the mark is the priority with 12ft/lbs air rifles then most people find the flatter shooting .177 easier to do that at all normal ranges; which makes it the "best". If you can do the same with all the other calibres then there isn't a "best". Few can.

FAC then everything changes.