Ron, I've never had any luck with nitro powders in the Magtechs. My Accurate powder reloading booklet has an article about the importance of crimps and how they effect pressure. There isn't much resistance by gluing OS cards in compared to a fold or roll crimp. I sold 300 Magtechs after trying to get good loads with smokeless. I believe Charlie has had some success with them. Let us know if you find a way to use them with nitro powders.
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Paul Harm
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