BROX,

I believe I'm shooting an energy cam bow, 31 inch draw length,70 poundbow set at 62 pounds draw weight. According to the chart below my minimum total arrow weight is 392 grains. I'm currently at 395 grain total weight. That's cutting it close in my book.

Here is a quote from another web sight:
"However, since the IBO Standard applies at most 3D courses, many competitive shooters setup their arrows to weigh exactly 5 grains per pound. This keeps them just within the rules while providing the fastest possible arrow speeds. However, bowhunters usually choose arrow weights between 5 and 9 grains per pound. Later on in this guide we'll use an online arrow weight calculator to build a simulated set of arrows, so you can make sure that your arrows will be the appropriate weight for your bow before you actually order them".

Yes you are just within the 5 grians per pound which is good for competition,but for hunting purposes that isn't recommended from what I have been told. I understand you are getting pass throughs, but that's under perfect circumstances in my opinion. If that works great for you, which it sounds like it does, than that's great. However, I choose to go a little heavier and the link below will show you where I got the information from. I'm at 6.4 grains per pound, not heavy by any means.

http://www.huntersfriend.com/arrowhelp/AMO-Minimum-Arrow-Weight-Chart.htm