Fire forming for the 7mm TCU

[Alderman]

Fireforming 223 brass in the 7mm TCU.
14" Thompson Contender at 100 yards.
Will be interesting to see what happens when I reload this brass after fire forming it.

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[DizzyJ]

We need to stay in contact. I've got a similar setup and will eventually be getting one of these barrels. I think it might be a good way to go!

 

[HighlandLofts]

Probably the same pattern. Atleast mine was.

 

[P7M13]

I don't bother trying to gauge accuracy when fireforming. When converting from another cartridge, I have found it takes two firings to completely shape to your chamber.

 

[HighlandLofts]

I am going to convert 223/5.56 brass to 300 black out.