- May 8, 2016 at 11:55 pm #27685
I have had some pour luck with case re-forming in the past, and I am looking for a better way.
My objective is to form 7TCU brass from 223 brass. The only method I have used in the past is simply running the 223 brass into a 7 TCU sizing die. Yes I lube the inside of every neck, and slowly force the 223 brass over the larger expander.
I loose very few brass from split necks. But the problem I have is shortening of the case length. Some brass come out .03/.04″ shorter than before they are resized. All of the brass I resize are measured and are the longest of all of the brass I have.
Can I resize the brass by using a small charge of say Bullseye and filling the case or part of it with COW.
- May 9, 2016 at 12:12 am #27686Larry GibsonParticipant
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Yes you can fire form the cases that way. Before sizing in the die adjust it so the new shoulder is slight crush fit when chambered.
- May 9, 2016 at 2:02 pm #27695
Thank you Larry. I was hoping my ignorance wasn’t showing again.
- May 11, 2016 at 12:55 am #27743skeettxParticipant
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AND shoot the COW outside or you may break some florescent bulbs 🙂
- May 12, 2016 at 2:33 pm #27771
I just got done watching a few You tube videos. So I am now an expert on the subject.
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