"Burnt" barrels and the .17Rem?

[Catfish]

The .223 has a case cap. of 28.12 gr`s of H20 and the .17 Rem. of 27.23 gr`s. of H20. You can`t form .17 Rem . cases from .223 brass though as they will be to short, they must be formed from .222 mag cases if you want to form your own.
Also you can definately burn out a .17 cal. barrel. Most barrels are burned out because someone shot to many round in to short a time and got the barrel to hot.