Loading 9mm for a Glock, has anyone noticed/tested and found any significant accuracy difference between rounds loaded with mixed brass as opposed to brass sorted by manufacturer/lot/markings etc.? I know there are dimensional/capacity differences, and I know that loading for accurate rifles it does matter. I just have never tested to see if they actually translate into a difference I will see shooting a pistol unsupported (Not off a rest). Thanks Wanna kill these ads? We can help!