I just purchased a new Ruger 77/22 rifle. I have read that you need to try different types of .22LR ammo to find the one that shoots best in your particular rifle. However, in looking around, I have found a bewildering assortment of brands, types, etc. Can anyone recommend, say, five good basic .22 types/brands which I might start with? And what's the difference between regular loads and "stingers", high-velocity, CB, etc. (is there a website which explains all this?)? Thanks!