MSM ended the half off of two consecutive makes by Berry for a 31-18 halftime advantage.
Sulphur's Gilbert knocked down a three to start the third and cut the lead to 31-21 with 7:40 on the clock. That would be the only bucket of the period for the Lady Bulldogs as MSM's pressure defense would cause 11 turnovers.MSM took a 44-21 lead into the final quarter.
The Lady Rockets were never threated over the final eight minutes.
MSM had two players reach double figures, Berry led the Lady Rockets with 16 points and Rischard ended with 12. Hagood contributed nine and Kaelyn Bond chipped in seven.
Gilbert led Sulphur with nine points, Williams and Lancaster each had eight. Lancaster also garnered seven boards.
Sulphur will play at 3:00 p.m. Friday against Lomega MSM will play Ada in an 8 p.m. semifinal showdown.