Maurice O'Shea Shiraz is made from vines over a hundred and twenty years of age, planted by the estate's original proprietor, Charles King. A smaller portion is sourced from eighty years old rootstock on the adjoining Old Paddock Vineyard, planted by legendary winemaker Maurice O'Shea, who recognised the special characteristics and longevity of Hunter Valley wines. One of the nation's great wines, Maurice O'Shea once outscored Penfolds Grange and Henschke Hill of Grace to be the highest rating Shiraz in the Halliday Wine Companion.

Hand picked grapes are crushed and cold soaked over twenty four hours to extract maximum colour and flavour. The juices are inoculated with a neutral yeast to initiate vinification, which takes place in open fermentation tanks. Half way through fermentation the cap was headed down to achieve maximum extraction. The wine was then pressed to finish primary and malolactic fermentation in barrel. Once complete, Maurice O'Shea is aged in a selection of the finest quality, exclusively French oak barriques for up to eighteen months. During maturation the wine is racked and returned twice to build complexity in the middle palate, mellow the tannins and allow the sweet berry fruit to emerge.