Ashish hurled the 5kg ball and chain to a new distance of 71.92m on his opening throw and went on to improve it further to 72.04m to stamp his class with fine rotations on the circle to set the first national record of the meet.
The previous national record stood in the name of Haryana's Sukhdev Singh (70.35m) since 2009.
Only a Chinese thrower, Xu Wenjie has a better mark than Ashish in the Asian rankings with a 72.35m this season so far.
Meanwhile, Bandana Patel grabbed the gold in the girls' 5000m race walk event with an upset win over Priyanka Patel, who had bagged the yellow metal in the youth category of the Junior Nationals in Vijayawada last year.
Bandana exhibited her skills to increase the pace gradually and move ahead as she approached the home stretch to finish the race in 26 minutes 36.15 seconds. Kerala girl G Nisha also overtook Priyanka in the last 200m for the silver position in 26:41.53. Priyanka clocked 26:43.87 to finish third.