It's not just the cock-on-closing - my antique Lee-Enfield has an incredibly smooth action, slicker than any Krag (or any other bolt action rifle) I've ever seen:
"The term
'Mad Minute' was also used to describe a regular demonstration, by instructors at the
School of Musketry at
Hythe, Kent that was intended to show officer trainees the maximum rate of accurate fire that could be achieved by an expert with a service rifle.
The first Mad Minute record was set by
Sergeant Major Jesse Wallingford in 1908, scoring
36 hits on a 48-inch target at 300 yards (4.5 mils/ 15.3 moa).
[1]
Another world record of
38 hits, all within the 24 inch target at 300 yards (2.25 mils/ 7.6 moa), is said to have been set in about 1914 by a Sergt.-Instructor Snoxall.
[2] 'Sergt.-Instructor Snoxall' was probably Sergeant Frank Snoxell of the
Loyal North Lancashire Regiment, who was an instructor at the School of Musketry from October 1913 until January 1917." (link below)
en.wikipedia.org