Here are all the instances when a bowler has taken 10 or more wickets in a match
at less than 5 runs/wkt:
1.9 Briggs (Eng) 15/28 v Eng Cape Town 1889 Eng won
2.2 Ironmonger (Aus) 11/24 v RSA Melbourne 1932 Aus won
2.7 McGrath (Aus) 10/27 v WI Brisbane 2000 Aus won
2.8 Toshack (Aus) 11/31 v Ind Brisbane 1947 Aus won
3.0 Lohmann (Eng) 15/45 v Eng Port Elizabeth 1896 Eng won
4.2 Walsh (WI ) 13/55 v WI Wellington 1995 WI won
4.4 Barnes (Eng) 13/57 v RSA The Oval 1912 Eng won
4.4 Lock (Eng) 11/48 v WI The Oval 1957 Eng won
4.7 Laker (Eng) 19/90 v Aus Manchester 1956 Eng won
4.9 Woolley (Eng) 10/49 v Eng The Oval 1912 Eng won