A Primary Styles Score (from 240-479) indicates that this is a Style that you are naturally comfortable in, and one in which you can operate indefinitely.
If your Predictable Success Styles Profile showed a score of 450 for the Visionary Style, for example, then you would be a Primary Visionary, able to engage in Visionary activities (e.g. strategic planning, generating new ideas, creatively solving problems etc.) indefinitely.
Note that it’s possible to have more than one Primary Style.
This free course provides more detailed information on interpreting your Predictable Success Styles Profile Scores.