Ross duly set about his ways on the "dead" wicket, scoring with conviction against spinners Floros and Labuschagne in pursuit of 275 after Travis Head lost the loss.
Ross cooly rotated the strike with Jake Lehmann as the experienced middle-order batsmen took the game on, with Ross top-scoring with 53 (53).
Despite the depth of the batting in the squad, Lehmann's dismissal for 33 ended the 79-run partnership and the Redbacks consequently lost the next two wickets for no runs.
After a solid start with the new ball which had the Bulls at 5/81, Michael Neser came to the crease and troubled the bowlers through the middle overs.
The allrounder's resilience and big-hitting prowess proved crucial for the home side, with a knock of 97 not out and match-winning partnerships of 99 with Labuschagne and 96 with Gannon which posted a total of 9/275 for the Bulls, and the Redbacks stalled in their chase.
Conventional one-day openers Alex Carey and Jake Weatherald couldn't make a start as Ferguson and Head set about rebuilding the innings after their early departures.
Their 74-run partnership for the third wicket only temporarily stalled the Bulls, when Ferguson was caught by Truloff and dismissed for 43.
Joe Mennie and Chadd Sayers were the pick of the bowlers with 3-65 and 2-41 as the Redbacks next face the National Performance Squad on Thursday.