I've had quite good luck with good ol' Wallyworld Federal Champion 500 bulk pack ammo in my 22s. It runs flawlessly. More recently, I decided to try some different brands of .22 ammo just for fun. I tried Winchester's 555 bulk pack. Multiple malfunctions. I'm not used to malfunctions in my M&P 15-22 nor my Ruger SR22 Pistol. Not liking it. I tried Winchester's M22 ammo. Also multiple malfunctions. Not as many as the 555 bulk, though. Not impressed. Today I tried some CCI Tactical. It's a bit more expensive... about $20 for a pack of 375. The first thing I noticed about it was that it felt better in my hands. I mean the actual cartridges felt better between my fingers as I loaded the magazines. It sounds weird, but I could tell a difference in quality. The cartridges were smoother. And, they weren't as DIRTY. When I load Federal Champion into my M&P 15-22 mags, my hands get dirty and gritty. That ammo is covered with "ammo-schmutz," apparently. I always wash my hands after handling ammo. But, with Federal Champion, I WANT to wash my hands. When I loaded 6 mags of CCI Tactical, my hands weren't dirty! I'm not suggesting that this is of any significance. It's just something I couldn't help noticing after having loaded thousands of Federal Champion. Shooting the CCI Tactical was also flawless. OK... I only fired off 100 rounds. But not a single malfunction. I am not an expert ammo tester. I didn't do any comparisons of accuracy. It did seem to be less "smoky," though. No doubt, CCI ammo is at another level. Is it worth the premium of 1.3 cents per round over Federal Champion? Maybe not for general plinking. But, I could definitely perceive a difference in quality. I'd buy CCI tactical again. But, I won't be buying Winchester 555 or Winchester M22 again. No matter which you choose, it's WAY cheaper than .223! I enjoy shooting .233 a lot. But, I just LOVE my M&P 15-22. In this economy, I've come to appreciate .22LR!