I've aquired a 7-300 weatherby 9tw and fire formed some brass with 180 hornady and magpro from 74-78 gr with no signs of pressure.

I'm looking for load data for this case and bullet. I have magpro, 7828, h1000, h4831, rl22, rl26 and imr 4831 to work with. The gun shot magpro well enough but I don't have a lot of experience in temp swings with it. I don't mind burning the h1000 up if it is the right choice.

Anyone have any recipes to share or ql data?

Thanks in advance.

Originally Posted by BrentD

I would not buy something that runs on any kind of primer given the possibility of primer shortages and even regulations. In fact, why not buy a flintlock? Really. Rocks aren't going away anytime soon.