Hey Ed, finally got around to setting up the Chrony. I have to say that the 440 is the twangiest, harshest, jumpiest air gun I have ever shot. I have a new GRT-III trigger on the way so that will help with the groups.
Now, with some serious concentration, I can get 1" at 25yds with any pellet I have tried. I took the rifle apart and cleaned the lube (looked like rusty water) out of the mechanism, lightly hatched the cylinder with scotch brite, and lubed the seal and chamber with moly. I used the super sticky white lithium (dont have any tar yet) for a light coating on the outside of the spring. That helped quiet it some. I have to say that my Crosman Phantom, and the Quest 800 are MUCH smoother shooting and much more accurate for me than the Gamo 440. More time and a few hundred more pellets will tell eh?
Anyway, here is the chrony results for the pellets I use most.
CPHP avg 888.6
Gamo Match avg 928.5
Tomahawks avg 907.8
These are about the same velocities as the Phantom. The 440 seems like a well built rifle, and according to Gamo, they are the largest airgun mfg in the world. Hope it smoothes out and becomes as good as its Crosman clones.