The Vegas 300 and NFAA 300 rounds.
This blog has one of the more user friendly explanations: https://charlesarcheryblog.wordpress.com/tag/how-to-score-nfaa-indoor-5-spot/
Remember that the full set of rules is available on the NFAA Constitution. The explanation of indoor rounds starts on page 55:
https://www.nfaausa.com/…/d…/files/2014-15%20ConstByLaws.pdf