We integrate moral norms and stewardship identity into the Theory of Planned Behavior (TPB) to predict the use of non-lead ammunition in the California condor recovery zone of southwestern Utah. Data were collected from licensed hunters via an online survey. Structural equation models of the TPB without and with the moral norms and stewardship identity constructs were compared to evaluate the utility of integrating these constructs into the TPB. Moral norms did have a significant direct influence on hunters’ behavioral intentions. Both moral norms and stewardship identity had significant indirect influences on behavioral intentions via the core constructs of the TPB. The inclusion of moral norms and stewardship identity into the TPB marginally improved model fit and predictive power. Managers can emphasize a moral obligation to use non-lead ammunition and tap into hunters’ desire to steward the landscape and the hunting tradition in their communication and outreach efforts.