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6mm dasher brass

The Norma 6 Dasher brass has longer necks and you will have to trim them all about .050". Also, the Norma is slightly smaller than Lapua at the .200 line. You may get loose primer pockets sooner.

Added. I would go with the Alpha. May still have to neck turn depending on your chamber.
 
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I use the Norma Dasher brass, I several guns, all were chambered with a reamer for that brass(long necks). It shoots great for me, I have some with over 15 loadings on them and the primer pockets are still good and I ran them on the hot side with 110 SMK's doing 3000+ fps. Just run a mild load the first loading or two to harden the head and you will be good to go. I didn't do that on mine and its still been good.
 

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