What does the manufacturer reccomend? For my Mathews it is 5 grains per inch so for a 70 pound bow that comes to 350 grains. The arrow itself will weigh less than this becaue you have to figure in the broadhead, fletching and nock in the weight.
I think if I remeber right 5 grains per inch is a pretty standard number for all bow makers. I beleive if your arrow weight is under 350 grains tthe bow can explodeon you. I think to keep things safe I would try to get my arrow weight around 420 grains. For one your bow will be just that much quieter. I pull 67 pounds on my Hoyt and my arrows weight 450 grains and it sounds like a truck hitting a wall when the arrows hit their mark.
Let me start by telling you the story of two Johns.
John number one went on a day hike with a couple of friends in the Cascade Mountains about an hour from Seattle. He somehow got separated from his buddies and became lost. John was dressed in casual cloths for a warm weather day hike and had nothing but a lunch with him. He spent three days in those mountains and luckily made it out to tell the story.
John number two, a friend of John number one, was much better prepared when...