#4's work well - usually. I have one with a brand new 2-groove barrel I rechambered for the .312 EXPRESS, (Ken Waters). It drives a 174gr. Hornady at 2,940fps - maybe a bit steel for that bullet. I do have some 180gr. Norma to really play with.
-------------------- Daryl
"a gun without hammers is like a Spaniel without ears" King George V