Search:

There were and still are many 'wildcat' cartridges based on the 30-06 case shortened, necked up and down. The same with many other cartridges, such as the 8x57 [Germany], 303 [Australia and Canada],...

Keep in mind the 303 was developed before 1900 and slowly evolved subsequently. Almost unchanged since about 1914 I believe.

The 308/7,62 is a shortened 30-06 known in the USA as a 'wildcat' long...