Home Forums Hunting & Shooting Gunsmithing Measuring throat length

Once the barrel is pulled, you can drop the desired bullet into the old barrel and take a measurement from the base of the bullet to the breech end of the barrel using a depth mic and then using a separate throat reamer and that bullet, simply advance the new throat and bullet the desired distance.

Or, you can do the above measurement and transpose it to the case as in the photo, measure the overall length of the bullet and case, and like HalH mentioned, make up a dummy and send that to the reamer maker.