A very popular blend in Australia-particularly from South Australia, where the two varietals work well together. The most famous of these would be the Penfolds Bin 389, considered Australia's most cellared wine. In years gone by this was referred to as "Baby Grange" as some of the wine used barrels from the vintage of Grange.
The 2018 Paternus states only McLaren Vale Shiraz (no Cab Sav).