Quote Originally Posted by Tim K View Post
Your data on the 77's correlates to my own data quite well.

It'd be interesting to look at that bullet again and see if powders with different burn rates behave differently than Varget.

I'm no internal ballistics expert, but I'd suspect TAC (faster burning) might benefit even less from longer barrel length in the 18"-24" range? I wonder if that's true...
I have a TAC load that I currently use for competitions instead of Varget. I get just a touch more velocity out of it at the same accuracy. I shoot it out of 18s and 24s It's just an easier powder to reload with and that's the big sell for me.