![]() ![]() Out of 250 I probably have 20 or so that are similar to this, these are the worst ones. Some of the rounds where the primers were messed up. The Federal has a little more of a rounded edge going into the primer pocket, where the Winchester is more squared off. ![]() Here's a picture of the Winchester brass next to the Federal. I was mainly wondering if anyone else had run into this problem. Anybody have any other suggestions such as using different primers, etc.? I have CCI and Winchester small pistol primers that I could use instead. Would swaging this brass or reaming the primer pocket help this problem any? I hate to think that I can't use this brass, as I have more of this than anything else. The thread about primer detonation makes me thankful I didn't have one of those. I realize I probably "forced" a few of these in too much, and have learned from that. I ruined a few primers, and have some rounds where the primers went in, but are messed up. I'd say about 10 out of 100 would give me problems with the Winchester brass. I switched over to Federal brass about half way through and didn't have a single problem. I'm assuming from the primers being pushed in. ETA: I forgot to mention, there was a lot of brass shavings that got everywhere while using the Winchester brass. I am using a Dillon 650 for loading these rounds. It gets reseated against the recoil.I ran into a problem with Winchester 9mm brass (not crimped) and Federal small pistol primers yesterday where most of the primers would go in ok, but every now and then one wouldn't go in or it would go in with a "crunch". Also note that the primer moves during ignition due to internal pressure. ![]() The primer cup is soft enough that it will form to a slightly odd shape. The primer flash hole is punched during forming and that "keyhole" appearance isn't of significance as long as the primers stay put. I honestly think you are going beyond what is necessary. As mentioned above military crimped primer pockets usually require reforming. The 9mm case is so short that the powder will go bang as long as there is just about any pathway to the powder.Įven shooting 9mm Precision Pistol games at 25/50 yards I'm not aware of anyone going beyond a basic case inspection when using SAAMI spec'd brass. If you are seeing "blow-by" around the primer that's another story, over pressure, defective or out of spec brass! Is it necessary to uniform primer pockets or flash holes or otherwise do anything special to pistol brass? Is this brass safe to use? Did I just get a bad batch? Has anyone else experienced this issue? Thank you for your input. After I deburred the pockets they were nice a round shape internally but still had a keyhole on the outside. I also always debur the primer pockets but, again, i was surprised that they had so many burrs. I looked at them with a 10X magnifer and the keyhole was only surperficial it did not extend into the interior of the brass. Then I noticed that a lot of the primer pocket holes appeared to be a keyhole instead of round. This was surprising as I did not have to remove so much brass with the sig and starline. However, I always uniform the primer pockets of all my new brass with a sinclair carbide uniformer and it took out quite a lot of brass. ![]() The starline brass is too thick at the base so resizing can be a problem, so I thought I had hit it out of the park with the winchester brass. i have used the sig brass and it is very good just pricey, i felt. I was very glad and felt lucky to score several bags of winchester 9mm brass. ![]()
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