I know several local guys who bought green devil ecos at claybank then a week later at another local game had double feed and jaming issues with the same batch of bbs, at that point I disposed of all the green devils I had at my place and continued to use the bastard ecos I had sitting in my garage from last years claybank game. I've left them sitting beside a windOw which gets all the afternoon heat and they still work flawlessly.
Over the years I've also used excel, elite, guarder, guarder heavy grade, tm, evike, tsm, metal tech, and a few others that I can't remember the names of. I've always ended up back with my Bastards as they are the only ones to never disappoint me.
Saskatchewan Age Verifier! Contact for more Info.
http://airsoftcanada.com/showthread.php?t=174161 - Honour & Respect your fellow players! #Airsofthonourandrespect