Okay I think I need to take the next step with my reloading . I have vertical shot patterns that would be small and tight if I could get my vertical spread down. So , do I need to buy a concentricity gage ? To measure my bullets and see if they are in line with center of the neck ? If they measure to be off what then? Do I need to buy another tool ? Needing advice from someone who has been down this road before ? Thanks in advance.