Magman,

7mmTCU reminds me of 308 Winchester... Just about any old load will make you seem to be a GREAT reloader and shot... <snicker>

I'd recommend using your favorite medium burning rifle powder and starting a full 2gr below maximum because if JD chambered it tight and used a Shilen barrel you will probably get pressure signs at below "book max"...

7mmTCU is one of the "perfect" Contender cartridges...

$bob$