Interesting choice. When using that one would you have to leave one groove exposed when reloading or can you push it down into the case until both grooves are covered.
Also, wouldn't 311-100-2R be a better choice? It seems perfectly made for this round.
Do you resize them down to .308 or leave them at .311? Lee load books say the bullet should be .308, but others (Sierra, I think) show the bullet as being .311.