Anyone else had accuracy problems with Gamo pellet guns? I have a Gamo .177, and I've had some problems getting it to shoot consistent groups. It's the hunter model and came with a fixed power BSA scope. The scope is definitely attached tight and I have the rubber stopper that fits up against the back of the mount on. I can't get the dang thing to shoot very accurately at all! I'll think it's sighted in, then it gets off again. I've tried all the different styles of ammo Gamo makes as well. I was just wondering if anyone else has had this problem and if it would maybe help to take off the scope and shoot open sights. Thanks.