Rashid Khan, another Delhi golfer, was in second place, one stroke behind the leader.
Md Islam of Patna was in third place with a score of 67, while leader Shamim's elder brother Gulfam occupied joint fourth place at 68 along with Arshpreet Thind of the Golden Greens Golf & Country Club.
Tournament favourite Jyoti Randhawa occupies tied sixth position at three-under-69 along with Delhi's Manav Jaini, Abhinav Lohan of Faridabad, Kolkata golfers Ranjit Singh Rathore and Shankar Das, Chandigarh's Randhir Singh Ghotra and Rajesh Kumar Rawat of Lucknow.
Rajesh made a hole-in-one on the 17th. Manoj Kumar of Lucknow also made a hole-in-one on the 17th in his round of 75 that placed him tied 63rd.
Defending champion Chirag Kumar, meanwhile, was two over 74.
Shamim, currently placed second on the 2012 Rolex Rankings, was off to a flying start at his home course with a super 64. He got on a roll with four straight birdies on the fifth, sixth, seventh and eighth.
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The 34-year-old sank putts from a range of six to 12 feet on the fifth, sixth and seventh. He then chipped it within three feet on the eighth. Shamim then added another birdie to his card with a chip-in on the 10th.
Shamim made further inroads with a 25-feet eagle putt on the 14th and a birdie on the 16th to close the day at 64. (MORE)