Archaeologists believe they have found more evidence of the 1880 gun battle between Ned Kelly's gang and police at Glenrowan, in central Victoria.

Bullet fragments were uncovered during excavations at the former Anne Jones Inn site earlier this month.

Now archaeologists have revealed that two bullet cartridges from a Martini-Henry rifle were discovered in the northern section of the site on Friday afternoon.

Excavations Director, Adam Ford believes they came from weapons that would have been used by police at the time.

"They [the cartridges] were only released to the police approximately two weeks before the siege event," he said.

"They were superseded reasonably quickly after the event. I mean within a couple of years. S I feel quite certain that they are physical evidence of the gun battle."