If an Avenger SS flies straight for you (it's usually regarded as a very understable disc, best suited for rollers) the answer is pretty simple: You can't get enough speed on the discs to get them to fly like they should. In short they're too much disc for you. Faster discs aren't automatically longer, they just have longer potential if you can get them up to speed. And the faster the disc the faster it needs to be thrown to get it up to speed.
By the sound of it you should head towards the technique section and work on your form, and favor your putters, mids and slow drivers for now, stuff around the Leopard and TeeBird speeds. You really should be able to push a TeeBird over 300' easily, closer to 350', before jumping for the faster stuff, especially the Boss. A good thing to practice is to learn how to throw putters long and straight, as you can't just arm them out there, you need to make them fly. A DX Aviar can easily take 300' with barely turning at all with good form, so you're aiming for a very straight flightpath. Putters can go 250' with very little effort when using proper technique. Also work with your mids.
Basically the discs are just fine, but you need to work on your technique, and there really isn't a shortcut for that. Look up tips on the technique section and practice, practice and practice.
Parks wrote:If the posts on this forum are any indication, the PD is like a Teebird with sunshine coming out of its butthole so hard that it flies faster.