Totally agree , they are both excellent for fox and vermin , but if your looking for a big ballistic advantage by selecting the 204, Im sorry it just isn't there.
I ran the two caliber together for a couple of years and compared them side by side on many occasions.
If you compare like with like , my 223 shoots a 40 grn Nosler at 3800fps - A similar speed can be achieved with the 204.
In my the real world field tests , the 204 had 1 inch of drop less than the 223 at 400 yards - I too was expecting to see a big difference at this range , but that's not the way it is in the field - (only on someones PC when they plug in BS numbers - i.e the b Youtube video above)
So the question is - WHY isn't the 204 far better than the 223 with the same weight bullet ????
Well the answer is very simple . the BCs of the 204 bullets are shamelessly hyped up - also the muzzle velocity are also inflated.
TBH what do expect when Hornady release a new caliber in 2006 that directly challenges the 223 and 22.250.
They aren't going to sell many if there slogan is " BUY the 204 - its just a tad flatter than the 223" .
At the time Hornady convinced shooters by using down loaded 22.250 data with very low BC soft point ammo - and compared this against inflated speeds and bullet BCs to sell the 204 dream. TBH i also jumped on the band wagon too , sounds to good to be true - and it is.
After comparing and testing the 223 and 204 i can absolutely say there is very little in performance in running a 223 shooting a 40 grn bullets at 3700 / 3800 fps and shooting a 204 at normal foxing and vermin ranges. If you want to shoot Longer Range - i.e above 4/500 yrds - neither the 204 or the 223 using light wight bullets are very good - but the 223 comes in many factory options that allow you to select bullets that are totally at home with these conditions.
Real differences are.
- 223 has far more rifle to choose from
- There are more barrel twist options
- There are far more bullets to choose from
- 223 is dear legal
- More choice of reloading equipment
- 223 has better barrel life
- and at the end of the day much easier to sell with a higher resale value. (due to the above)
As said they are both excellent calibers but the versatility of the 223 is a game winner for me
Alan