Hopup doesn't even take effect until about 40 feet.
The trick to quickly sighting in a gun. Set the hop so that the BB travels a straight path, then over hop a LITTLE. so that it curves up and then comes back down. It's a fine line.
Then adjust your sights to where the BB is shooting.
Ár skal rísa, sá er annars vill
fé eða fjör hafa. Sjaldan liggjandi úlfur
lær um getur né sofandi maður sigur.