Article referred to above is "Of Rooks and Rabbits, Mice and Men" by Ross Seyfried on pp. 28-35 of Rifle #192 (Nov. 2000). Description of the uses of the .300 Sherwood (medium and big game as well as rook and rabbit, apparently) but not much load data. He had a later article on Martinis that dealt with the .310 and .300, I think. I'll look for it when I get a minute.
