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Message: <blockquote data-quote="Blitzfike" data-source="post: 2452612" data-attributes="member: 807"><p>Being new to reloading, I can maybe save you some problems down the line. All the straight wall (Most are really tapered slightly) rimless pistol cases headspace on the case mouth (The length of the brass butted up against the end of the chamber sets proper headspace.) Semi auto cases are normally taper crimped, as opposed to the roll crimp used in rimmed pistol cases. If you notice any problems feeding, you probably have not set your crimp deeply enough. If the case mouth is the least bit belled from your loading operation, you will get mis-feeds and jams. I use the Lee Factory Crimp dies on almost everything I load. It comes closest to duplicating the factory crimp on hand loaded ammo. You can adjust your crimp deeply enough that it affects headspace, but you really have to work at it. Stay safe and enjoy..</p></blockquote><p></p>