I never have had one problem with the Lab Radar giving me a reading on jacketed loads. Not once. Lead is a completely different matter. It either gives me an error message that it didn't read the projectile or it sits there with a dumb look on it's face. I emailed them and I tried their suggestions. Basically it was move the unit closer to the muzzle and check alignment with target. Duh??? Still the same thing. Every once in a while if it feels like it, it will give me a good reading. Any suggestions or similar experiences?