Make sure you have accuracy and safety for your 223 Rem 7832323 bottleneck rifle case. Get the Lyman Reloading length/headspace gauge. This gauge allows the reloader to ensure safety and accuracy by providing a comprehensive inspection after a resizing occurs. It makes sure you have the proper headspace dimension maintained. Simply insert the reloader into the gauge to see that it falls in the acceptable range. You will also be able to measure the case length.