I have both a 7TCU and a 256 Win mag, both are fun to shoot and load for. The .256 is one of favorite barrels, with Sierra 70gr BlitzKings over a moderate charge if Lil'gun or h4227 it is very accurate and mild mannered, and deadly on varmits (crows, coyotes, armadillos, and beavers). I plan on taking a deer and possibly a hog with it this year. I also plan to do the same with my 7tcu.
The best advice I can give you for forming your cases is to anneal the first 1/2 inch of the case until it begins to change color (straw colored to slight blueish) This takes a little experamenting but once you get the hang of it you will lose few cases, if the necks split heat them a little more. lubricate the cooled cases well then run them into the seating die until the shoulder and 1st 1/8 inch of neck starts to form. Next just run them through a full length sizing die , trim to length and start loading. Btw the TC lets you use spitzer bullets and for best accuracy mine likes to be .030 off the lands. For larger varmits and deer sized critters a 87 gr Soft Point over a max charge of h4227 will shoot completely through a large coyote diagonally (22 inches of penetration) so should be just fine for a broadside deer inside 100yrds.