7mm TCU and 7mm08


Bohemian

New member
Are the 7mm TCU and 7mm08 interchangeable? whats the difference?

thanks in advance.
 

GeneticsDave

New member
Not the same. Read info on Wikipedia:

7mm TCU

7 mm-08 Remington

Basically the TCU necks up a .223 to accept a larger bullet, while the 08 necks down a .308 Winchester to accept a smaller bullet. While the bullet is the same size, the case is not.
 

Bohemian

New member
thanks, I should have looked in my reloading manual earlier, I see the cases are totally different...
 

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