Thanks Everybody - It is good to have other views.
tuffty's point about 20yards being a a long way for a CO2 pistol is interesting so maybe I should look for a PCP.
Has anybody else shot a CO2 pistol at 20yards?

When it comes to grouping I am getting most of the holes in the black on a PL15. Not brilliant but 12 week ago I was lucky to get them all in the target

Cheers