Questioned by prosecutor Richard Jenson, he said he identified each gang by their colours, red for the Mongrel Mob, while Black Power wore blue.
To Tawhai's lawyer, Gene Tomlinson, Burborough agreed the noise he heard was consistent with birdshot hitting the ground.
Detective Christopher Wharton described the scene that greeted him when he arrived at the Valley-Arawa roads intersection as a "sea of red".
Some in the group called him over and pointed to Black Power gathered in Arawa Rd.
opposite them.
"They [Black Power] were trying to intimidate the Mongrel Mob. I saw one of the Mob members with a bat or pole gesturing at the Black Power to come and meet them. The Mongrel Mob was inching up behind us [police]. I saw someone in the Black Power group with something in their hands. At first I thought it was a bat or pole then I realised it was the butt of a rifle."
Because he was unarmed he made a dash for cover.
Another Rotorua officer, senior constable Simon Robinson, told of seeing a "short, fat fella waving a baseball bat like a taiaha" as the Mongrel Mob surged down Arawa Rd.
"He was obviously winding everyone up."
Seven Rotorua police officers testified today telling how they sped to Whakatane when the call for back-up came after tensions escalated when a 100-plus vehicle funeral procession for a senior Mongrel Mob member arrived at Whakatane's outskirts.
The procession had come from Kawerau into an area regarded as Black Power territory which was the cause of the animosity between the opposing factions.
The Rotorua police confirmed they had armed themselves with either rifles, Glock pistols or Tasers and donned body armour before leaving home base.
With the exception of Taipete, the defendants are charged with rioting, participating in an organised criminal group, unlawful possession of a firearm, using a firearm against a law enforcement officer, and discharging a firearm with reckless disregard for the safety of others. They have denied all counts.
Taipete has pleaded not guilty to the firearms-related charges, having earlier pleaded guilty to the rioting and criminal group charges.
The trial before Justice Graham Lang is proceeding.