More money for the rifle, more noise, more weight, more time at the loading bench. It's definitely a hell of a lot "more". Just doing some quick figuring, for 50rds of .223 you'll spend $9 on Hornady V-Max bullets, $3.20 on powder and perhaps $1.50 on primers. That's $13.70 per 50rds. Whereas .17HMR is $11.50-$12.00 per 50rds. Folks can say that they would rather reload a small centerfire as a matter of personal preference but let's be realistic about the numbers.the 223 is just a hell of a lot more for the money.