Meanwhile Sinnott, the World No. 41, also managed to take advantage of the benign morning conditions to claim the early lead.
"I don't think you'll ever see Royal Melbourne play as easy as that," said the Victorian who is playing the event for the first time. "It is great to get off to a good start but I am not getting ahead of myself."
The conditions were most favourable in the morning. Only 11 of the 120 strong field broke par today and only two of that 11 were in the afternoon field as the wind grew in strength.
Levin amateur Tyler Hodge had a solid morning round with an even par 72 to be tied 12th while Joshua Munn (74) was the slow off the mark. Australian Amateur Champion Tae Koh (74), Blair Riordan (76) and Jordan Bakermans (76) all grinded hard in the brutal afternoon conditions without much reward.
The New Zealand No.1 Beale, who has been studying on a golf scholarship at Mercer University, said the firm and fast greens and fringes made the Alister McKenzie designed layout a real challenge.
"When the wind picks up it doubles difficulty-wise. It wasn't so bad today on the wind front but I would be surprised if we get tougher conditions around here this week."
Beale, a former student of Kristin College, likes his chances of contending at this championship.
"I feel comfortable here. My short game is pretty good and I can be quite creative. My long swing is still pretty iffy so I need to work on that if I am going to shoot some low scores. My game plan will be the same tomorrow. Have fun, put a smile on no matter where it goes."
The Asia-Pacific Amateur offers the winner an invitation to the 2015 Masters Tournament at Augusta National Golf Club, while the champion and runner(s)-up earn spots in the International Final Qualifying for The Open Championship.
Also in contention for the ultimate prize in golf was former Australian Boys' Champion Hodge.
The Wellington Stroke Play Champion was happy with his solid opening where he hit 14 of 18 greens in a great ball striking display.
"It is always good when you can shoot even par around this course," said the 20-year-old.
Hodge has a good track record around Royal Melbourne. In 2012 he finished tied 12th on his debut at the Australian Master of the Amateurs and last year he was only two shots back from the leader in the final round.
"The key around here is just keeping the ball in play and it suits my game. I like hard and fast courses. Course management is one of my strengths and that is a real priority around here."
His Manawatu - Wanganui team-mate Munn was feeling chipper despite his slow start.
"Well, 74 is not totally out of it," said the 23-year-old. "All I need is a good second or third round score and I am right back in it."
The Asia-Pacific Amateur Championship is organised by the Asia Pacific Golf Confederation (APGC), the Masters Tournament and The R&A. This week's tournament in Melbourne is the sixth staging of the event since it began in 2009.
No New Zealand golfer has ever won the event. Wellington golfer Peter Spearman-Burn and Masterton amateur Ben Campbell came the closest when they finished is a share of third and fourth place in 2009 and 2010 respectively.
In fact no golfer from Australasia has ever claimed the title. The champions so far include: 2009 Han Chang-won (South Korea), 2010 and 2011 Hideki Matsuyama (Japan), 2012 Guan Tianlang (China) and 2013 Lee Chang-woo (South Korea).
