You can't give up trying to get the decapping rod out of that case. Assuming that you eventually will, this has worked for me:
1. Put the die in a vice with case head facing up.
2. Drill whatever sized hole into the primer pocket that will accept a 1/4-20 tap. I'm not sure...maybe 13/64 bit.
3. Find something like a socket that will sit on the die but allow the case to be pulled up inside of it (picture a small, 3/8 drive socket upside down. Cut the threads into the brass case with your tap.
4. Put a 1/4-20 bolt with a washer under it (or whatever matches the tap that you used) through that upside down socket and thread it into the tapped hole.
5. Tighten the bolt until the head touches the washer that touches the upside down socket and it will pull that case right out. Once it gets out a little ways, you can yank it out with pliers.
You can't give up trying to get the decapping rod out of that case. Assuming that you eventually will, this has worked for me:
1. Put the die in a vice with case head facing up.
2. Drill whatever sized hole into the primer pocket that will accept a 1/4-20 tap. I'm not sure...maybe 13/64 bit.
3. Find something like a socket that will sit on the die but allow the case to be pulled up inside of it (picture a small, 3/8 drive socket upside down. Cut the threads into the brass case with your tap.
4. Put a 1/4-20 bolt with a washer under it (or whatever matches the tap that you used) through that upside down socket and thread it into the tapped hole.
5. Tighten the bolt until the head touches the washer that touches the upside down socket and it will pull that case right out. Once it gets out a little ways, you can yank it out with pliers.
I am not familiar with your particular die set. My 25 year-old Lyman decapping rod has a screw on expander that houses the decapping pin. When I got a stuck case in it, I turned the decapping rod counter clockwise to release the rod from the stuck case. From there, you can tap the decapping pin into the case if you need to with a small punch. Once I got my case out, I could just cut the case head off with a hacksaw and dump out the expander and pin. I know you're in a spot since .223 dies are as rare as anything else. Be careful and good luck!
You can try putting it in the freezer to help, or send it back to rcbs and they will fix it for free and we also sell a stuck case remover if you can't get it out and don't want to send it in.
So far I have never had a stuck case, but this is great info, thanks for sharing.
Dave