just another 300 cartridge

[pug]

I was curious if there was any interest in another 308/223 based cartridge for the AR-15 or any other .223 platform. Not really for subsonic use because of increased case capacity but suited ideally for (supersonic) 125 to 150 gr bullets yet all the heavys can be used as well. Calculated power shows higher than 7.69x39 for same bullet weight but that can be off somewhat. This isn't a money maker because I don't make barrels for sale. I am just wondering what everyone thought.