Thread: Brass issue?

Hi there,
Something from ballistic tools website

"As the illustrations show, the bottom of the die is rounded, and much of the base is in the shell plate. Most dies will only size to within about 1/4th inch of the base of the brass. If the head of the brass is expanded or flowed due to overpressure, loose chambers, or both, then a standard die, or even a "small base" die can't do anything about it. This effect, when pronounced, will often leave a visible ring on the brass near the base. The presence of a ring does not necessarily mean that the brass has flowed to the point where it will not chamber, but it is a sign that the brass has begun expanding in the section that a sizing die can't reach."



Also can you measure the shoulder bump with verniers and a spacer ( right sized tube etc) of some sort to see if it is bumping the shoulder more than it needs. It looks as if the brass is thicker under that ridge.

The edge of the die has a chamfer on it's circumference?

Good luck it looks like a sharp wee ridge somebody will know.