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because it does not rotate in the chamber it must be on the lands!
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Most likely it's not in the lands, especially not at that short of OAL. I'd suspect that you're either headspacing on the bullet shoulder rather than the mouth of the case, or perhaps that you've not got enough crimp on the round. Before you worry about the round freely rotating in the chamber, I'd start by seating it out to a longer OAL and then dropping in the barrel to check your headspace. Decrease the OAL until the round is headspacing correctly, and then you start playing with crimp until the round is dropping freely in and out of the barrel. This is where something like the Lee Factory Crimp Die is really nice because it post-sizes the round and usually resolves any excessive chamber tightness.