I checked this thread out again,...and after some of the observations others have made,....I think the problem you had with the Gamo Variety pack pellets and the Rockets being so much better is in direct relationship of weight to speed, and how your strong your rifle is. Here's my theory,.....pellets shooting the high 900's to the 1000+ fps range must have to have a little more weight to remain stable,..other wise they'll tumble in flight and veer off course from the target. Example,...Crosman Silver Eagle pelets. Granted, your Variety pack Gamo's are for the most part "under-weight" from the standard 7.9 grainned pellet,...they wouldn't be that unstable as the CSE, but you get the idea,...Now if you're shooting heavier Rocket pellet's with far better accuracy,...this may be the reason why! And with that,...your rifle sounds to me like it's got some power!!!! Can't remember who stated this,...but I think he was correct in saying,..."The Gamo's might be a little to heavy for a steady diet",...or something like that,... For your rifle, I'd recommend The Beeman CroMag pellets. About 8.8 grains,...and absolutely leathal at 25 yards!!!! They're a heavier pellet,....but might not strain your spring and seal as much. Like many others have said,....keep experimenting with all sorts to see which works the best in your weapon. Just stay away from the Hyper Velocity lite weight crap!!!! LOL's tjk