Concentricity certainly does matter. And tight necks are super easy to work with for the life of the brass.
Way back when the world was young, I made up a batch of .22-250 out of .308 to make tight (and long) neck brass for a factory chamber. Fun project, good learning experience for a pup (which I was). Worked out really well. Still have that batch of brass somewhere I bet.
What was really interesting, was sectioning some of that brass, along with the WW stuff I normally used back then and comparing. And measuring capacity. Surprisingly big difference. And it was the .308 stuff that had the greater.
Like I said, fun project, good learning.
- DAA
Way back when the world was young, I made up a batch of .22-250 out of .308 to make tight (and long) neck brass for a factory chamber. Fun project, good learning experience for a pup (which I was). Worked out really well. Still have that batch of brass somewhere I bet.
What was really interesting, was sectioning some of that brass, along with the WW stuff I normally used back then and comparing. And measuring capacity. Surprisingly big difference. And it was the .308 stuff that had the greater.
Like I said, fun project, good learning.
- DAA