For 9mm brass, there's definite difference between "FC" and ".FC." with dots.
The FC-with-dots 9mm brass is quite a bit heavier than the no-dot-FC. The with-dots FC is among my favorite 9mm brass.
For 9mm brass, there's definite difference between "FC" and ".FC." with dots.
That has consistently been my observation. I have my cutter set to about 1.750. Whenever the cutter does not trim anything off, it is almost always a FC case.What surprised me was that for the vast majority of the FC cases (about 250 out of roughly 300) the cutter never reached the case mouth. The cases were 1.753 or less. On the other hand, virtually all of the LC brass required trimming, some generating abundant brass shavings in front of the trimmer. Anyone else had this happen; where one once-fired case stretches hardly at all on firing while another once-fired cases seems to stretch dramatically?
I've noticed this, and recently learned that it's a different production process (extrusion) that is used on a lot of the Vista conglomerate brass. Most Blazer brass is the heavier style and is equivalent to the .FC. I've been using Blazer and .FC. as my mainstream 9mm brass with excellent results.The FC-with-dots 9mm brass is quite a bit heavier than the no-dot-FC. The with-dots FC is among my favorite 9mm brass.
Toprudder wrote:
I'm not sure that it is from the brass stretching on some (LC) and not others (FC). I just think the FC was short to begin with. The only way to really know would be to pull some factory rounds and measure the cases before firing.