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Poodleshooter · December 5, 2000, 05:58 PM

Already been done. The usual wildcat is the 6x45mm cartridge-a .223 necked up to 6mm. There's also a 7mm version I believe, though that's probably getting close to a straightwalled case! Problem is that you are losing velocity with each gain in weight. Powder capacity is pretty limited with the .223, I'd hate to see how much it loses with a larger bullet.

December 5, 2000, 05:58 PM	#2
Poodleshooter Senior Member Join Date: August 7, 2000 Location: Floating down the James River in VA Posts: 2,599	Already been done. The usual wildcat is the 6x45mm cartridge-a .223 necked up to 6mm. There's also a 7mm version I believe, though that's probably getting close to a straightwalled case! Problem is that you are losing velocity with each gain in weight. Powder capacity is pretty limited with the .223, I'd hate to see how much it loses with a larger bullet.