Karrawarra Pastoral, Eurongilly sold all Highlander Maternal and FocusPrime Terminal rams offered in their private treaty sale on Tuesday.
The stud divided the two breeds of 14-month-old rams into three tiers based on the Lambplan Maternal Wool Plus index and Lamb Eating Quality index, selling the large line of rams for an average of $1633 per head.
Stud manager Hannah Anderson said the rams sold to NSW, Victorian and South Australian buyers, with some headed for Kangaroo Island. There was also interest from several new clients this year.
"We've been overwhelmed by the support," Ms Anderson said.
"We're really happy with the draft, I think they're the best rams we've seen in a spring, it's helped that it's been a really good season."
One of Karrawarra's new buyers was Ben Haseler who manages Bowylie, Gundaroo, a prime lamb enterprise owned by electronics entrepreneur Dick Smith.
Mr Haseler took home a total of eight top tier Highlander rams.
He said he was looking at Karrawarra Highlanders to push the envelope when it came to their lambing percentages.
"They're also going to suit the sheep I have already," Mr Haseler said.
"They've got good shape, great fertility and there's some good figures to back them up."
Six of the eight rams picked out by Mr Haseler happened to be from the same sire, a ram Ms Anderson said had bred especially well for them and had been included in the 2019 Meat and Livestock Australia Research Flock.
Other volume buyers took large runs of up to 40 rams.
Karrawarra is the nucleus flock for Highlander genetics in Australia.
Ms Anderson said the Highlander, which originated in New Zealand, was bred for high fertility, high maternal instincts, low adult weight and high lamb survival rates.
The genetics aim to deliver increased kilograms of lambs weaned per ewe joined. Highlanders are used in both self-replacing composite flocks and first-cross enterprises.