I used to own one.
.30s seemed to work best
make sure everything is snug on your scope and make sure nothing is loose and make sure when you scope it in your on a nice hard surface where you can get a consistent shot
other than that i would start upgrading accuracy before power like get the PDI hop up and then but in a good barrel dosen't have to be a 6.01 just make sure its not one of those MadBull 6.03's those things are junk.
and don't listen all the pro AEG people do what you want just because they didn't like it wont mean you wont. so you might not get as many kills as a trigger happy M4 user. its about having fun that counts...
I really don't think people should be discriminating SNIPER RIFLES on the SNIPER RIFLES SECTION. if obviously they post something about a SNIPER they dont want to hear about an AEG.