The Hawks were 6-for-52 from the field as they dropped to 4-5 in league play.
Mallory Thoreson poured in 21 points for Hinton, which improved to 8-0 in the WEC.
Sadie Shuck chipped in with 14 points while Lauren Hedlund added seven and Breana Bollmeyer scored six.
Bollmeyer handed out five assists while Ashton Moody dished out six. Thoreson and Alli Ohl each gave out four assists.
Thoreson grabbed five steals while both Hedlund and Moody had three.
Hedlund and Thoreson each wrapped up seven rebounds for Hinton, which plays at Spalding Catholic on Monday.
Anyssa Trejo scored eight points to lead the Hawks.
Emma Krier grabbed seven rebounds and Brielle Biezuns grabbed six for RSM, which plays at Unity Christian on Tuesday.
Hinton lost for just the third time this year in non-conference action on Saturday.
Thoreson scored 15 points and grabbed nine rebounds to lead the Blackhawks, who fall to 15-3 on the season.
Ashton Moody chipped in with 13 points. Moody also grabbed five rebounds and handed out four assists.
Lauren Hedlund pulled down four rebounds while Morgan Mehrer, Jenna Riediger and Thoreson each dished out two assists.
The Blackhawks were 7-of-10 from the foul line and grabbed just three steals in the loss.
Hinton committed 22 turnovers.
Mac Augustine led Bishop Heelan with 13 points.
The Crusaders are now 10-8 on the year.
Hinton returns to action on Monday at Spalding Catholic in a makeup game originally scheduled for last week Monday.
The Blackhawks play at Class 1A No. 15 West Sioux on Tuesday.