Objective: A growing body of theoretical and empirical work suggests that mindfulness may support more positive posttraumatic outcomes by reducing posttraumatic stress (PTS) and encouraging posttraumatic growth (PTG). Positive reappraisal (PR), a cognitive coping correlate of dispositional mindfulness (DM) has also been linked with greater PTG. However, neither DM nor PR have been modeled in relation to core posttraumatic constructs such as core belief disruption, intrusive rumination, deliberate rumination, PTS and PTG. Method: This study explored associations between these constructs in a sample of college students (N = 505), also investigating the impact of contemplative practice involvement on the relationships between the constructs. Results: Results indicate that including DM and PR into established models of PTG increases the model’s explanatory power, which distinct cognitive coping pathways connect DM and core belief disruption with PTS as well as PTG, and that contemplative practice involvement substantially alters relationships between the core PTG variables. Conclusions: The present study contributes to the growing reconceptualization of trauma as linked with both positive and pathogenic outcomes, emphasizing the need to better understand how posttraumatic cognitive coping strategies contribute to more positive outcomes.