RE: Arrow Flight different with broadheads vs. field points
Excellent excerpt from an arrow tuning article.
" Some people say you can get broadheads and field points to hit the same place. That might be true in some cases, but more often, it is not. Look at the physics of it. A broadhead is longer than a field point. That will change the balance point of the arrow and you will have more weight forward as well as the points of arrow flex will change. Now you also have a set of wings on the front of the arrow and the fletch acting like wings on the back trying to off set the wings on the front.
Broadheads will have less affect on a heavy slower moving arrow because there is more mass and less air pressure on the broadhead blades. Arrows that are flying over 280 fps will not shoot broadheads well because of the light arrow weight needed to shoot an arrow that fast and the amount of air pressure on the broadhead.
Recently there was a big dispute in NASCAR over the rear spoiler height on one manufacture’s cars. They wanted to raise the rear spoiler by something like 1/4” because they could not keep up with the competition. Does it make sense that a broadhead will not change an arrow, but 1/4” added to the rear of a ton and a half car traveling at about the same speed as an arrow will make a difference?
Typically, people will find that their broadheads will hit low left of their field points. Some people say you should move your nocking point and rest until field point and broadheads hit the same place. That is fine if that is your main purpose [/b]instead of accuracy.[/b] It is best to tune your bow for your broadheads and then sight in for your broadheads. Do not worry about it if your broadheads and field points do not hit the same place. Mark your sight for each or have a different sight for each. Remember, accuracy is what counts.
Do not compromise your accuracy just so your arrows will hit the same place with broadheads and field points."