d_striker Posted July 17, 2015 Share Posted July 17, 2015 I load Federal primers in 9mm due to a light sprung gun. After ensuring that the primer is seated, I seat deeply as possible by leaning into the handle. I don't like the term "crush" seat but that's what I'm doing to ensure primers are as deep as possible. One side of the primer gets seated deeper than the other. Does anyone know what's causing this uneven seating? I don't think it was happening before. Link to comment Share on other sites More sharing options...
Bkreutz Posted July 17, 2015 Share Posted July 17, 2015 Loose shell plate? Link to comment Share on other sites More sharing options...
d_striker Posted July 17, 2015 Author Share Posted July 17, 2015 Loose shell plate? That was my first thought. Not it. Link to comment Share on other sites More sharing options...
bowenbuilt Posted July 17, 2015 Share Posted July 17, 2015 This comes from the way the shell is held by the plate. You have one whole side of the shell that is unsupported or not caught and held down by the shell plate. When hard seating primers it causes the shell to lean inward. The primer is fully seated but at maximum pressure the shell is sitting slightly cocked in the shell plate so the primer is crushed slightly more on one side, the side leaning in. Link to comment Share on other sites More sharing options...
dave33 Posted July 17, 2015 Share Posted July 17, 2015 I don't load on a 650 but get the same thing from time to time on my press. Most primers are evenly seated but you can easily see some that are not totally uniform. They always go bang even running a lighter striker spring. Link to comment Share on other sites More sharing options...
Alan550 Posted July 17, 2015 Share Posted July 17, 2015 Push hard.......release....rotate shell 180*.....repeat. Link to comment Share on other sites More sharing options...
d_striker Posted July 17, 2015 Author Share Posted July 17, 2015 Push hard.......release....rotate shell 180*.....repeat. Lol. No thanks. Link to comment Share on other sites More sharing options...
d_striker Posted July 17, 2015 Author Share Posted July 17, 2015 This comes from the way the shell is held by the plate. You have one whole side of the shell that is unsupported or not caught and held down by the shell plate. When hard seating primers it causes the shell to lean inward. The primer is fully seated but at maximum pressure the shell is sitting slightly cocked in the shell plate so the primer is crushed slightly more on one side, the side leaning in. Nailed it. Thanks. Link to comment Share on other sites More sharing options...
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