The .30-06 Springfield cartridge was introduced in 1906 (thus the 06 in the calibre designation). The .270 was created in 1925 by necking down the .30-06 case to accommodate lighter .277-inch bullets.
The .30-06 can be loaded with .30 calibre bullets ranging from 150gr to 220gr, and a wide range of factory ammo is freely available. Most popular is the 150gr and the 180gr variants.
Popular bullet weights for the .270 is the 130gr and 150gr variants, but a much wider variety is available. The .30-06 is the ideal choice if you want to shoot from small to big antelope, while the lighter recoiling .270 is ideal for lighter game. With lighter high ballistic coeficient bullets it also shoots flatter at distance.
