I've never head of your rifle, but I too have recently picked up a new air rifle (Air Arms TX200 in .22 caliber) and bought the Straight Shooters Pellet Sampler pack to help my pick the best performing pellet for it.
Other sampler packs I found were dedicated to a manufacturer's brand, but this sampler pack offers a multitude of different manufacturer's pellets.
I case other's are interested, I bought the .22 caliber pack. Here are the pellets, 25 pellets each, nice variety. (I didn't see one for .177 caliber - maybe you can call and ask them)
* JSB GTO Lead Free 11.75 gr
* H&N Baracuda Green 12.65 gr
* H&N Sniper Light 14.04 gr
* JSB Exact Express 14.35 gr
* H&N Field Target Trophy (FTT) 14.66 gr
* H&N Field Target Trophy (FTT) Power 14.66 gr
* JSB Hades 15.89 gr
* JSB Exact 15.90 gr
* Air Arms Diabolo Field 16.00 gr
* Vortex Strike 17.75 gr
* Air Arms Diabolo Field Heavy 18.00 gr
* JSB Exact Heavy 18.13 gr
* H&N Baracuda Hunter 18.21 gr
* H&N Crow Magnum 18.21 gr
* H&N Baracuda 21.14 gr
* H&N Baracuda Match 21.14 gr
* H&N Baracuda Power 21.14 gr
* JSB Monster Redesigned 25.39 gr
Here's a link to the my .22 caliber sampler pack
http://www.straightshooters.com/search.php?mode=search&page=1 Bobby