I have 2 rifles that are both 308. One is a sporter barrel and one is varmint barrel. I am going to cut them down and also thread the varmint barrel. I am wondering where the correct place is to begin measuring. If someone says they have an 18 inch barrel, is that 18 inches overall length, or 18 inches from the end of the barrel nut threads, or from some other place?
Thanks for your help.