GOULBURN district stud, Wollondale, Towrang, claimed three out of the four broad ribbons in the Sydney Royal Hampshire Down ring, exhibiting the grand ram, and grand and reserve ewes.
Jurambula stud, Ryan via Henty, prevented the feat by exhibiting the reserve grand ram.
Judge Wayne Whale, Walla Walla, who is the agriculture teacher at St Paul's College, Walla Walla, entered the ring looking for sheep displaying thickness, depth of body and meat characteristics, along with mobility.
In the line up for grand ram, it was the older exhibit, drawn from the woolly ram one to two years old class, which caught his eye.
"This is an impressive exhibit - he's got all the characteristics of the breed, showing thickness through the body, standing well, and displaying well-developed testicles," Mr Whale said.
Wollondale stud manager, Matthew Sherwood, said the grand champion ram, tag 372, had been reserve grand champion ram at last year's Sydney Royal to another Wollondale ram, and was champion Hampshire Down at the Dubbo Sheep and Wool Show last May.
"His sire was 6601 a ram which had been a breed champion at the Australian Sheep and Wool Show at Bendigo as a hogget," Mr Sherwood said.
In the grand ewe line up it was the younger of the two Wollondale exhibits - drawn from the milk-tooth shorn ewe and two-tooth and over shorn ewe classes - which triumphed.
Mr Whale later discovered his choice for grand ewe was a daughter to the reserve grand ewe.
"I like everything about the grand ewe, her capacity and ability to move about - she's and all round excellent performer," he said.
"She might be yet to lamb but she shows the potential for a great future."
Wollondale stud principal, John Cordukes, Towrang, said the grand champion ewe had made her showring debut at Sydney, while the reserve ewe had previously been shown at the 2014 Geelong Show, which was a feature show for the breed, and placed in her class.
The Wollondale stud was founded on Marananga bloodlines from Launceston, Tasmania, and Mr Cordukes said the reserve ewe's pedigree could be traced back to this line.
The Wollondale champions will next head to the Australian Sheep and Wool Show at Bendigo later this year
The reserve grand champion ram was exhibited by Helen Raven and her daughter, Jess Sturgess, Jurambula stud, Ryan via Henty, who have been exhibiting at the Royal for the past five years.
This young lamb ram carries Toropoke bloodlines from New Zealand, which had not been widely used in the stud.