I'm with BruceM, rifle reloading is a different puppy all together. Pistol or auto's need to be to a standard length. As long as you are consistent they will always shoot the same. My Ruger (bolt action)shot best .015 off the lands and that's because the case swells when fired. All rifles are different so if you stay with a standard length they will work good in any gun. The load data is a starting place to work from.