I have two Gamo 440 and if you are shooting 1" at 10 yards, a good 6 power scope should solve your accuracy issues. I have a Leepers BugBuster 6X32 on my .177 CFX and have had no issues. the zero may drift a bit, but I check my zero farily often and rarely see the change being over 1/4" at 10 yards. I rather have no change but a Bushness 4200 Elite scope costs more that any of my air rilfes inclusing a tuneup by CDT and a trigger. The other cheap scopes from Simmons, Tasco, and Barska that I have bought are likely just a waste of money. I also encourage you to consider looking in our GTA Library and trying out the ideas for better springer accuracy. Try several things and be willing to go to 20 yards for your accuracy testing, you will not get many shots on game at 10 yards! Hope you stay in the air gun game!