WayneConrad
Member
I've got fired 9mm cases with a bulge that the resizing die doesn't touch. Sometimes the act of seating a bullet expands the bulge enough that the cartridge no longer meets spec and must be rejected.
After resizing, I run all the cases through a Midway max cartridge gauge looking for cases that need to be trimmed. I rarely find those. What I do find are cases that are too fat to fit in the gauge, even after resizing.
Here is a resized case with the bulge:
On thise case, the base is 0.387 (spec says 0.390), the bulge is 0.390 (spec says 0.387), and the mouth is 0.374 (spec says 0.380). The bulge is 0.167 from the base.
Here's the resizing die:
What's really annoying is that there are some cases where the bulge is just skinny enough to make it through the cartridge gauge, but seating a bullet causes the bulge to increase in diameter just enough so that the cartridge no longer fits in the gauge and has to be rejected. This happens to about 8% of the cartridges I load.
What should I be doing differently?
After resizing, I run all the cases through a Midway max cartridge gauge looking for cases that need to be trimmed. I rarely find those. What I do find are cases that are too fat to fit in the gauge, even after resizing.
Here is a resized case with the bulge:
On thise case, the base is 0.387 (spec says 0.390), the bulge is 0.390 (spec says 0.387), and the mouth is 0.374 (spec says 0.380). The bulge is 0.167 from the base.
Here's the resizing die:
What's really annoying is that there are some cases where the bulge is just skinny enough to make it through the cartridge gauge, but seating a bullet causes the bulge to increase in diameter just enough so that the cartridge no longer fits in the gauge and has to be rejected. This happens to about 8% of the cartridges I load.
What should I be doing differently?
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