I have been reloading for a number of years but only started chrono-ing my rounds for the last 2 years or so. Before that, I just tested for accuracy, only paying attention to group size. Now looking more into the standard Audette's ladder test, followed by Dan Newbury's OCW tests. Without going into what my chrono test result are, I'm wondering what kind of ES and SD numbers guys are typically seeing. I have loads that are accurate but have ES of up to 50, and SD in the low 20s. But I also have accurate loads for another gun that sometimes has ES of 100 and SDs of 30. I know that because of barrel resonance, a lower ES & SD doesn't automatically equate to a more accurate load. But low ES&SD are at least a start, right? So what kind of ES & SD do you guys typically see when you've settled on a good accurate hunting load? (accurate = always < 1 MOA) Also, what kind of consistency in these numbers do you see? In a particular gun, with the same recipe over several sessions I experience variations in these numbers too. The ES might vary 50fps and the SD might vary 10+ fps. The rifle I'm most concerned about at the moment and that I'm describing is a BAR in 270win. It is capable of printing .5" 4 shot groups at 100 with certain recipes but its a lot harder to develop loads for that bolts I have. Should I automatically expect wider ES & SD from an auto loader than a bolt?