I've had really great luck and accuracy with the TC 250grSG Shockwaves out of most of my ML's. They load fairly easy, yet still groove good. The regular shockwaves are good too. Alot of ML's like them. Powerbelts can be good too as stated. Some versions tend to break up on impactwhen pushed to fast.
I also only use 100gr. powder whether pellets or loose. I believe I could hit a half dollar @ 100yrds.(shockwaves) Most of the time, with that setup in my Omega. And I don't really practice a whole lot. This is bench shooting at the range of course. It's freaky how good they shoot for me. I'll pay a couple extra dollars for them because you hardly ever get fliers. At least I don't. Maybe I just got lucky and got an especially good Omega...lol I am way better a shot with the Z5 than before. coinsidence? I don't think so. lol

chris