People were still killing DG with .4xx and .5xx calibers prior to WWII, not everyone was using rat calibers. The other thing is prior to WWII if one wounded an animal and it escaped it did not cost people $5K - $7K in trophy fees. So, in this case you gain extra fees if your 9.3 is not sufficient. There is no upside to using a marginal caliber.Nothing ventured nothing gained. The 9.3x62 was killing dangerous game for 40 years until a little dust up called WWII disrupted ammunition supplies. I don't believe they started armor plating the critters after the war.