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What are the largest cartridges based on either the 5.56 NATO or .223 Remington cases?
I keep thinking its the .300AAC blackout?
On another forum; a person mentioned putting a rim cut in his 300 BLK handi rifle and using .357 Magnum cases necked down to .300 for his rimmed .300BLK loads.. got me thinking; is it possible to get a custom barrel spec made, and to blow out the 5.56 case even more to say .327 or .338 caliber bullets if the 5.56 cases aint able to take 9mm/.357 cal bullets?
I keep thinking its the .300AAC blackout?
On another forum; a person mentioned putting a rim cut in his 300 BLK handi rifle and using .357 Magnum cases necked down to .300 for his rimmed .300BLK loads.. got me thinking; is it possible to get a custom barrel spec made, and to blow out the 5.56 case even more to say .327 or .338 caliber bullets if the 5.56 cases aint able to take 9mm/.357 cal bullets?