Had this happen twice. Trying to find the cause. The shell fires but fails to eject because it is stuck in the firing chamber and the primer is blown out of the primer pocket. Ran into this when I first started reloading and the cause was to much gun powder. Now, I'm vary careful about the correct amount of powder going into each shell and I never use the maximum amount of powder, always the recommended about. I suspected my digital scale was off but that has been checked and it is accurate.
In the picture notice the shell casing is swelled out casing serious sticking in the firing chamber. It looks as though the shell backed out of the firing chamber about 1/8" swelled and seized up. Again, the primer also get blown out. The shell puller and ejector also damaged the shell as you can see.
After removing the shell, I test fired some store bought ammo it worked flawlessly, proving the problem is my reloads.
After returning home I pulled a few bullets and weighed the powder inside each shell and it was the exact correct amount of powder for each bullet pulled. The powder I use for my 300 Blackout is H110 and I'm using a fresh 1 lb jar of the powder.
Is it possible there is something wrong with this powder? I seems the problem surfaced using this powder. Should I undercharge my reloads using this powder and by how much?
My other reload calibers, 223 and 9mm are working fine but I'm not using H110 in those loads.
Hope someone can figure this out.
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