Not 284 brass, but a couple of years back I bought a large amount of Winchester once fired .45 ACP brass. About 50 of them had absolutely huge flash holes, the flash hole was so large that there almost wasn't any place to seat the primers in the primer pocket. On a whim I contacted Winchester to see if by some chance they would replace the brass. The rep I spoke with flat out told me "it wasn't their problem" and "that I should contact the vendor I purchased it from". I told him they only sold it, YOU MADE IT this way and passed it on to the shooting public, this got no response. I again said, are you people going to make this right and replace it, he said they would NOT, it wasn't their problem. I said that this was the last G-D time I'd ever buy anything with the name Winchester on it. I asked to verify the response, "you're not going to make this right with me" he said nothing except "is there anything else I can do for you"? I said "else" would imply you did something for the matter I contacted you about, then he hung up. If anyone from Winchester might read this post, take this to the bank I will never buy ANYTHING else with the Winchester name on it, with customer service like that you can kiss me where the sun don't shine.