I want to update this post. After talking to a gunsmith who did some customization on my rifle, and I added a new target barrel, I no longer use the Aguila ammo. The stuff was really accurate at longer distances (for a 22, of course), and made my 10-22 shoot like a .17 HMR or a magnum, but the trade-off was not good. The gunsmith told me that Aguila is getting these results by packing large, super-hot loads into these rounds, and he feels these kind of loads in a .22 LR will actually damage your rifle if you use it for very long. So, sorry if this disappoints anybody, but based on his recommendation, I'd suggest you steer clear of the Aguila super max 30gr HP stuff. Their other stuff is fine, BTW, if you want to try that.timlt said:I've found that my 10/22, a new stainless model from this year, is quite accurate but only with certain ammo types. The best accuracy results I've gotten thus far are with that new, super-fast Aguila "Super Max" 30gr HP. With this stuff, I could shoot 1.5" groups (bench rest, using 8x power on my scope) at 100 yards. No kidding! It's the highest velocity 22LR ammo that you can buy, shoots at 1750 fps, with 204 ft lbs of energy. Try finding ANY other 22 ammo with those ballistics; the list is pretty short if there are any at all. I found that, while typical 22LR ammo at 100 yards can drop 8 to 12 inches or more, this stuff barely drops at all, maybe an inch or two. I'm not kidding, it's like shooting a centerfire at 100 yards.
The one potential down-side to note with this ammo is, the first brick of it that I bought was very greasy and dirty. It fed ok but really slimed up my action, would sometimes cause misfeeds in my mags, and really required good cleaning of the gun. If I get more that's this dirty, I'm going to find some way to clean the ammo before using it.
You can get the Aguila ammo, and see a few user reviews, here: