Short distance sighting

[DuramaxDude]

I can see how this could be a viable process much like following a trajectory chart for different loads and ammo when sighting in a rifle. I have done that a lot. A lot of the old timers I grew up with always sighted in rifles at 25yds "cause that @#$% will be on at a 100" the older I got I realized that wasn't the case. I would really think that there would be many factors would play a big part in this for archery though. Weight of draw, draw length, arrow length and weight etc... the things that go into the fps the bow is slinging the arrow, properly tuned bow, the height of the target etc...... All different set ups would have a different rate of rise and fall right?

[BigFoot]

Arrow weight and draw do not affect this. All bows shoot arrows in an arc. All you are doing is impacting the target in the rising portion of the arc instead of the dropping portion. Meaning the arrow is rising and hits the target up close in the same spot as it would after it has risen to its peak, and begun its descent at a longer range.
There is also a visual parallax in play here because your arrow is actually 4-6 inches lower than your eye, and line of sight. If your anchor is consistent, this does not change regardless of the distance you are shooting. The only difference is rising versus dropping for the arrow.

Like I said before, I have sighted in 40+ yard pins using this method for years, and have been within 1-2 inches, usually less when I stretched it out to the actual distance. If you can hold steady at six yards, and at 40 yards, your POI will be within a few shaft diameters of each other.

You sound like you know what you're talking about.

[codyw2006]

Arrow weight and draw do not affect this. All bows shoot arrows in an arc. All you are doing is impacting the target in the rising portion of the arc instead of the dropping portion. Meaning the arrow is rising and hits the target up close in the same spot as it would after it has risen to its peak, and begun its descent at a longer range.
There is also a visual parallax in play here because your arrow is actually 4-6 inches lower than your eye, and line of sight. If your anchor is consistent, this does not change regardless of the distance you are shooting. The only difference is rising versus dropping for the arrow.

Like I said before, I have sighted in 40+ yard pins using this method for years, and have been within 1-2 inches, usually less when I stretched it out to the actual distance. If you can hold steady at six yards, and at 40 yards, your POI will be within a few shaft diameters of each other.

I dont know, im just making an uneducated guess. But the arc rise and fall should be more drastic with a heavier or slower moving arrow than a lighter faster arrow. Just like a bullet. Now in a distance as short as 40 yards i guess the differences could be minimal idk but ill take your word for it!

[DuramaxDude]

Arrow weight and draw do not affect this. All bows shoot arrows in an arc. All you are doing is impacting the target in the rising portion of the arc instead of the dropping portion. Meaning the arrow is rising and hits the target up close in the same spot as it would after it has risen to its peak, and begun its descent at a longer range.
There is also a visual parallax in play here because your arrow is actually 4-6 inches lower than your eye, and line of sight. If your anchor is consistent, this does not change regardless of the distance you are shooting. The only difference is rising versus dropping for the arrow.

Like I said before, I have sighted in 40+ yard pins using this method for years, and have been within 1-2 inches, usually less when I stretched it out to the actual distance. If you can hold steady at six yards, and at 40 yards, your POI will be within a few shaft diameters of each other.

Dang sure worth a shot!!!!!!!! Gonna have to try it out.

[catslayer]

Arrow weight and draw do not affect this. All bows shoot arrows in an arc. All you are doing is impacting the target in the rising portion of the arc instead of the dropping portion. Meaning the arrow is rising and hits the target up close in the same spot as it would after it has risen to its peak, and begun its descent at a longer range.
There is also a visual parallax in play here because your arrow is actually 4-6 inches lower than your eye, and line of sight. If your anchor is consistent, this does not change regardless of the distance you are shooting. The only difference is rising versus dropping for the arrow.

Like I said before, I have sighted in 40+ yard pins using this method for years, and have been within 1-2 inches, usually less when I stretched it out to the actual distance. If you can hold steady at six yards, and at 40 yards, your POI will be within a few shaft diameters of each other.

You sir need to go back and look at your physics book....

YES THEY DO MATTER... The speed of the projectile "flattens" the ark the faster it goes, therefor the place that the arrow crosses the line of sight will be different.

Speed of the projectile is effected DRAMATICALLY by weight of the projectile and amount of force it is shot with...

Anybody who has spent much time looking at Max point blank range where you are playing with the very top of the ark of the bullet will understand.

Yes THEORY works with anything that travels in an ark, but the actual ideal distance of sight in would actually change dramatically depending on the speed of the projectile... Look at a bow, less than 5 yards on the initial pass through the line of sight, but a bullet say 5.56 if I remember is 36ish yards... the old military stand by is sight in at 50 and verify a 200...

they work no different both are projectiles, NOW... to be fair, will it get you CLOSE, yes it will probably get you close... but if your like me and like things perfect out 8 decimal places... well then your gona need a chrono...

[catslayer]

I dont know, im just making an uneducated guess. But the arc rise and fall should be more drastic with a heavier or slower moving arrow than a lighter faster arrow. Just like a bullet. Now in a distance as short as 40 yards i guess the differences could be minimal idk but ill take your word for it!

No you are correct... the question becomes what do you accept as "good enough".... If I'm shooting 30 and my vanes aren't touching.... it is not a good group, But then again, I like to shoot golf pencils at 30 yards...

[bowhuntntxn]

If you look at the graph above, it is an asymmetrical arc. And because of that, the loss of downrange speed is accounted for.

Now if you decided to sight it in using this method, and then changed to a lighter or heavier projectile, or changed the speed of your projectile either up or down, then of course it would be different.

But a projectile traveling at 279fps will always have the same arc pattern on both the front and back ends every time you shoot. Just like a bullet traveling at 1243 fps will.

[jjaimes]

I tried it and yes it worked on one of my bows and on the other one it didn't I do believe speed makes a difference not every set up is the same