I certainly wish that more bullet makers ( in the US anyway) made the 215 grain RN .311-.312 .303 bullet for loading or in a factory load. I use the 180 grain RN .312 Hornady mostly in my .303 No.1 mkIIIs and a Sporter of the same action. I also use these in my 7.65 Mausers with good effect and accuracy.
I would load the 215 if it was more available. It has such a good reputation from my reading of early and mid 20th century hunters. The woodleighs would be great, but too expensive for me. I buy woodleigh for the 8mm and the .375. I economize on the .303s. If I had more hunting opportunity, maybe. I took a moose in Alaska in the early '70s with a 180 gr .303. But, between the eyes at 30 paces wasn't much of a test. He just dropped. Face on and high brush. A duh! look on his face. I sort of felt bad after, but he tasted pretty good.