Yep, 9mm All Around. I've been putting the Federal Wally World 115gr loads through it pretty much exclusively and it seems to like them just fine. I have put two boxes of NATO 147gr loads through it too, but can't say I noticed much difference in accuracy. I haven't bench tested though, so it could be that the heavier bullets are a better match. I'll have to check next time at the range. As for grouping, it's capable of much better accuracy than I am at the moment, but yes it makes it very easy to shoot 3" groups at 25yds, which is about my personal slow-fire limitation right now, and probably half what the gun is capable of. I need more practice!