7mm tcu

  1. Snidely70431

    Fire forming 7mm TCU from .223/5.56 brass

    A TC Contender I got recently came with a 7mm TCU barrel. Checking online, I found that most videos showed using 7mm TCU dies to expand the .223/5.56 brass to 7mm, then fire forming the result in the barrel that will be using by firing a loaded cartridge. This process seemed unnecessarily...
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