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$ 2.50 per
Cartridge
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6mm TCU
("Parent Cartridge")
.223 Remington or 5.56x45mm
6mm TCU
for
(Thompson Center/Ugadle)
Developed in the 1970's by Wes Ugalde
of Nevada for the Thompson Center
Single Shot Pistol to use in silhouette
competition.
Formed from the .233 or (5.56x45mm)
Remington, the case mouth is  increased  
from 22 caliber to 6mm and the angle
of the case to the neck is increased from
23 degrees to 40 degrees, case length is
almost the same, but the shape is
definitely different from the .223
Remington!
Wildcat
6mm TCU
Cartridge
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6mm
TCU
6mm
TCU
.223