Harry Caldwell, who were active in Asia,) perhaps the finest big game shots our country has produced, were aware of the outstanding performance of the 318 Westley-Richards with a 250-grain bullet, the 333 Jeffrey with a 300-grain bullet and the 350 Rigby with a 310-grain bullet on thin-skinned dangerous and non-dangerous game in Africa.It is of passing interest that the bullet for the old British 333 Jeffery is much like the 300-grain copper tube bullet which Winchester introduced for the 338 Magnum.