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Scorch · July 11, 2013, 01:09 AM

A wildcat cartridge is a non-standard, non-factory loaded cartridge, with no dimensional or load standards. A cartridge that gets standard dimensions, and standard pressure rating (usually from SAAMI) becomes a production cartridge, even if no ammunition is factory loaded for it (like the 22BR, and 6mmBR were originally).

And yes, 7.62X51mm NATO was developed from the 300 Savage, but it had specifications and standard dimensions right from the get-go because it was developed cooperatively by Springfield Armory and Winchester for the then-new experimental T-25 rifle.

July 11, 2013, 01:09 AM	#3
Scorch Senior Member Join Date: February 13, 2006 Location: Washington state Posts: 15,248	A wildcat cartridge is a non-standard, non-factory loaded cartridge, with no dimensional or load standards. A cartridge that gets standard dimensions, and standard pressure rating (usually from SAAMI) becomes a production cartridge, even if no ammunition is factory loaded for it (like the 22BR, and 6mmBR were originally). And yes, 7.62X51mm NATO was developed from the 300 Savage, but it had specifications and standard dimensions right from the get-go because it was developed cooperatively by Springfield Armory and Winchester for the then-new experimental T-25 rifle. __________________ Never try to educate someone who resists knowledge at all costs. But what do I know? Summit Arms Services