Well, Tim, lets see...
Pros for the 204;
Total vaporizing of smaller varmits. Very high speed. Seems to be very accurate from what I've heard. Suppose to be easy on the barrel.
Pros for the 223;
What else... a military cartridge. Ammo can be had anywhere. Very accurate. Full metal jacket stuff can be found for $4.00/box or less.
So that means a lot more plinking for a lot less. Good to 300yds on varmits. Some can shoot further. And for the price I don't have to reload for it. Just ordered 1,000 rounds of the Win. White Box 45 JHP's. Getting them for $11.87 for a fifty (50) pack. That's shipping and all.
I've been reloading for over 20 years. I want something to shoot cheap and not have to reload.
Heck... I've still got two boxes of the Nosler Preminum Brass that I won at the PD shoot out in OK.
I think I'll stay away from the Cons of both. Can't type fast enough so my post will not enter.
Dennis