Sure it would be, just make sure you have a steady shooting platform, ie. shooting sticks, bench, tree, etc. I have a T/C contender chambered in .44 magnum with a 14 inch barrel. I'll tell you one thing, that thing is a monster. Everyone that sees it automatically extends respect! Make sure with the 223cartridge that you have a sufficient barrel length to maximize the powder burning prior to the bullet exiting the barrel. 12 to 14 inches would be ideal for a handgun.