The win put the Beavers at 4-1 in the league and 4-3 overall.
Buena Vista shot 24 of 64 for 38 percent, including 36 percent in the second half.
Loras, on the other hand, was 24 of 58 from the field for 41 percent. The Duhawks, however, were victimized by 28 turnovers.
Kinzee Hanson led Buena Vista in scoring with 16 points. Jessica Jensen added 15 and Allison Schultz 14.
Sally Rezabek had nine points and nine rebounds, while Amanda Nelson had six rebounds and eight assists. Jennifer Lange contributed eight points and six rebounds.
Buena Vista is idle until Dec. 30 when it plays at the Chapman Invitational in Orange, Calif.