I have used blazer 22 round nose and I have put countless boxes of the federal hollowpoint bulk packs though it without any trouble. This thing will feed almost anything and haven't had it hiccup on me yet. I do keep mine clean and well oiled though so that probably helps out.
right now i use wolf match. im trying to find somthing cheap and subsonic. wolf match is lose to the cheapest subsonic round out there an i already stock it
Mine has eaten pretty much everything I throw at it. The only time I had any real failures had to do with when I let some other folks load mags for me and the rounds didn't wind up getting canted correctly in the mag.
Generally I buy bulk packs of remington or winchester .22lr and I keep a few boxes of various velocities of CCI rounds on hand most of the time.
As far as bulk pack, Federal is my choice. I'm currently running Wolf MT through mine as well to keep it subsonic, since I run it suppressed primarily.
Mine only feeds Federal Champion consistently. I'm going to try some different ammo that is not hollow-point, to see if that helps. With Winchester, Remington, and even CCI, it has a failure to feed about every 10 to 15 rounds. With Federal Champion, it is pretty rare to have an issue.
I have ran Federal Bulk, Remmy Bulk, Winchester 555, American Eagle, and Agulia Subsonic through it without a problem. Even fired a few of the Aguila 60 gr SSS ammo without a problem.
Also using Federal bulk pack and some CCI stingers, all without any problems. In fact, I've had zero problems with my 15-22. I finally found some extra mags for it and I've had a lot of fun.