Go to all of your local stores and buy one box of each different kind they have. Do the same online at Midway USA, Cabella's, and all those others. Order one box of each. Then make up some paper targets. Something like 3 or 4 or 5 dots per page and compare the groups to see what is tight and which brands are too scattered. Do this at multiple distances such as 25, 50, 75, 100 yards. In my case I use 40, 60, 77, and 100 meters. It's a good project and may take multiple visits to the range. To answer your question, I can tell you I've done this scenario many times over, and one brand seems to better than many in quite a few cases. The Aguila Standard and the Aguila High Velocities have a habit of being among the very best in a lot of cases. Also true that SKS Standard Plus works well for me. We don't shoot the same guns. I don't use my Marlin for matches for this reason: CCI Standard velocity is a one-hole-wonder for chickens and pigs, but then the groups spread too much to use for turkeys and rams. What do I do with all the brands that don't work well? I shoot them up in my revolver plinking at much closer distances.