I bought a pro sport a few weeks ago .177. It seems to be a very good gun, unfortunately it was dropped from a height of about 4ft. There was slight damage to the stock but no marks to the barrel or any other metalwork. BUT
sighting it in now is a nightmare, I can put two shots on target at 25yds and the rest seem to drift, I just can't get a decent group. Up untill I bought this gun I was using an s410. I understand that fireing a springer is totally different to a pneumatic but untill it was dropped I was putting in some seriously good groups at 25yds. Could the barrel have moved? I have changed sight mounts and sights all to no avail.

It would seem, at face value, as if you have done it a mischief.

Thats truly sad as Ps's are great guns.

I would get it to someone who can tell you definitively what's up with it.

Bets of luck mate.

Duncan