Hey Dan, I've tried both in my 7t/cu's ,and other bullets also. The 130 ssp work ok in my 14" The 120 grainers work better in the carbine and the 10" and are almost as good as 130's in the 14".168 grain CAST bullets work great also!! Bum a few of every bullet you can and see what the barrel likes. WW 748 is a good powder to start with,so are H322 & H335. There aren't too many bad powders for the 7TC/u.