The soft greens proved tricky for some and those who began their rounds early in the day were forced to negotiate bitterly cold weather.
Strange, who enjoyed a bogey-free opening round, thought the pin placements at Millbrook helped players fly up the leaderboard.
"There are a few par-fives that guys will get home on, a few short par-fours," Strange said.
With showers forecast for today, Strange said producing a good score on the first day could prove vital.
"I think it's pretty crucial to have a good score on the board. If its gets cold and wet - it's forecast not to be nice - you might have a few shots to play with," he said.
Brown, who was the best of the Kiwis after day one, also enjoyed a bogey-free start and his extra study of Millbrook earlier this week reaped dividends.
Dominic Barson, Mathew Perry and Richard Lee were the next best Kiwis at four-under in a share of 10th place, among others.
Southland's Vaughan McCall was the leading amateur after the opening round as he carded a three-under 69 at Millbrook and was in a tie for 17th with fellow New Zealanders David Klein and Nick Gillespie.
Kiwi Michael Hendry, the pre-tournament favourite, finished with an even-par 72 to be in a share of 61st, alongside Rocco Mediate.