View Full Version : arrow grain

12-02-2007, 01:57 PM
how many grain arrow should be used in a bow that shoots a 28" arrow with a 70 lb draw. i was told 5 per lb well that would be 350 grain is 330 grain gion to make a huge difference

12-02-2007, 03:52 PM
Yes, it will. You are essentially dry-firing the bow, though not quite as badly. Martin is a pretty durable bow, but over time, the wear and tear will become quite evident in the form of cracked limbs, prematurely worn and broken strings, and a host of other problems. Not to mention excess noise, bow jump, hand shock, and vibration. The only thing you will gain is fps., approx. 7-10 fps. Not worth it by a long shot in my opinion. Not to mention that the BOW'S WARRENTY WILL BE ANULLED by doing this.

12-03-2007, 01:30 PM
There are a lot of opinions on this, but I believe that on a hunting rig you are best to be at 6.2 gr. (including BH). Yes; you lose some speed, but gain KE with weight anda quieter bow as well.

Play with a KE calculator: You will find that 6.2 max's out the KE. DO NOT go below 5.0 gr.