Originally Posted by
Digger_O'Dell
It's been my experience that IHs ring up about the same as wheats in comparable condition. Really corroded coins tend to ring up much lower. I've had really corroded zincolns ring up as low as a 12-20 on the CTX where there are normally 12-43. I've had wheats and indians both range from 12-30 all the way up to 12-44. My best guess is ground composition, corrosion, halo effect, nearby iron, orientation in the ground, or inconsistent composition. I think any or a combination of those factors will cause differences in readings.