I have one for my pistol reloads which has helped a lot. I am thinking about getting one for my .223 Rem cases when I start reloading them. I have an PAR rifle, Kel-Tec SU16CA which both shoot .223 & 5./56. I also have one for my 30 carbine and the only other rifle I load for is the .223Rem. I have a lot of once fired brass that has been fired from both the above mentioned rifles. Would it be a good idea to buy a Case length gauge? This question is just for my own piece of mind. Thanks for responding.