Hunt made a positive start with three birdies on holes three, six and seven but he found himself in trouble on hole nine after losing his ball and subsequently picking up a double bogey.
Birdies at five, six and nine put Runcie back at the top of the leaderboard before the pair went toe-to-toe and produced some outstanding golf on the back nine.
Seven straight birdies from hole 12 to 18 was almost matched by Runcie who made five consecutive birdies himself, but a bogey at hole 12 proved costly and he finished just one back at the finale, with Hunt winning thanks to a score of 12-under-par.