Quote Originally Posted by Russmerle View Post
To cool down some of the fire in this thread; I Mic'd two once fired brass fired from the same rifle and found a significant difference in the fire formed neck of the two pieces. I wonder if the warm barrel vs cold barrel was the cause of this. It was a 300WM sporter barrel.
Id be more curious as to why you mic'd the cases to begin with?
Was there a major difference in the performance of the 2 when you shot them?