Ingwe,
A couple years ago I decided to whack a couple with a .223 and 53 grain TSXs. I have never been able to get past the limited capacity of the case with Varget, even though Varget is by far my favorite powder for here in bigger calibers. I liked BL-C2 best and didn't have problems with it down to below 5 degrees F. TAC worked as well, but I just liked BL-C2 better in my workups, got a little better speed. TAC would have given me close to equal speed, but the rifle liked a little less a lot better. Both were quite a bit better than Varget speed wise, but I doubt if it would have mattered all that much at under 200 yards.
