Re: 300 Win Mag case neck wall thickness
I only have one piece of 300WM brass pretty new (leftover from reloading some ammo for a friend), it measures from .0140 to .0125 (depending which side of the brass). This is a little thinner than the typical brass I reload for myself (other chamberings), they are typically somewhere between .014"-.016". I'm using a starrett ball mic.
Hope this helps,
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