The brothers lived on separate blocks of the Bright family farm, about 3km apart.
On May 7, Bright and his brother gathered with friends at a shed converted into a bar on Phillip's property, where he began drinking alcohol about 2.30pm.
After some drinks, Bright and his brother headed out with two friends to mark the opening day of the duck shooting season.
They were positioned around a lake when Bright picked up his firearm and tripped.
A bullet discharged from the gun and hit his brother, killing him.
The surviving brother was then heard to say: "I've f***ed up."
Bright denied intentionally shooting his brother, police said.
He faced a charge for a second rifle-related incident days earlier.
At about 6.30pm on May 1 Bright arrived at the bar on his brother's property, where he got into an argument.
The argument deteriorated into a fight, so his brother Phillip stepped in to break up the tussle and told his brother to go home.
Bright got in his vehicle and drove away, only to return with a rifle, police said. He confronted the man he had been fighting with, and said: "Are you f***ing with me you Australian bastard?"
After a tussle, the rifle went off and the bullet punctured a hole in the canvas tarpaulin roof of the shed.
Bright has been remanded on bail until December 14.
Judge Lindsay Moore told him: "You better get your affairs in order Mr Bright."
Fish & Game Council chief Bryce Johnson said the death was hugely regrettable. "This is the first time we've had a duck shooting fatality for a long time."
He said everyone has to renew their firearms' license annually, and everyone was given a copy of the regulations and police-approved safety rules for firearms.
"We can't force people to read it of course."
The duck season starts on the first weekend in May and runs for about six to eight weeks, he said.
