Grant Burge's Corryton Park vineyard, one of the highest and coolest in the greater Barossa region, contributes most of the fruit. The balance is sourced from the finest Cabernet sites on the Barossa Valley floor. Harvest commences when the grapes achieve the ripest and most optimal Baume. Shadrach is treated to a traditional vinification in open static fermenters for a week, a portion of fruit is left on skins for an extended maceration developing structure and longevity. The balance completes primary and malolactic ferments in a selection of seasoned and new French oak barrels for twenty one months, followed by a term of two or three years in bottle before release.