littlebrotherC - I am in agreement with all 3 of these statements! Especially the part where I am slower than everyone here, but I have to think you are exactly right.
Darin,
This sounds very interesting but I have a question. I see how this works with the 12" hold under. Since there is a spot where you have a pin that you can hold 12" under and hit a +/-3" area from 10-42.5 yds (per your example), I have to believe that there is then a spot where you could hold exactly on the spot you want to hit and you would hit +/-3" of that spot depending on the yardage. Can you help me understand if I am totally missing something? I'm thinking you wouldn't want to do that because it would be in the middle of your 20, 30, or 40 yd pins.
Thanks guys, just recently got told about this website and I have found it to be awesome!
gunnar
Sorry for the slow reply guys - I made a post that didn't take about a week ago in regard to littlebrotherC's question...
To handle both questions at the same time, in short, no you can't...
The reason the system works is because we are taking advantage of the peak of the trajectory by using a longer sight in distance and aiming low. The range the trick pin works is 10 - 42.5 in my example because the arrow is rising and falling through that range inside the +/- 3" window that I chose to use as a miss tolerance in the example shown below.
I posted another graphic below illustrating the trajectory for a bow shooting 330 fps aiming dead on with a pin sighted in at 27.5 yards... as you can see the arrow drops out of the miss tolerance (more than 3" low at 33 yards). If we use a longer range pin than 27.5, the arrow will break out of the top of the tolerance at about 15 yards. I too wish there was an easier solution, but thanks to physics - this method is the only way to get this type of advantage. I've been using it and developing the method for almost 10 years. I've put a ton of thought into how/why it works and how to define it for anyone so it can be tweaked and customized for your individual setup.
LittlebrotherC - I'm not sure I totally follow the concept you brought up... but I don't think there's a practical way to measure the angle under varying field conditions - and it doesn't work if you are aiming point on. You can easily prove this by just trying it. Set up your target and try different pins at various distances and you'll see that if you aim dead on you will not be able to stay within +/- 3" over a very broad range even if your hunting bow shoots as fast or even faster than the one modeled in the 330 fps example above.
Also note that as you shoot from different distances with the trick pin, the correct yardage pin will always be on the vital while you're aiming with the trick pin 12" low because the target appears smaller at distance so effectively you ARE raising the bow the further back you get. That would not occur if you were aiming point on.
Another person asked me if you could maybe develop a similar system but aim at the top of the back with a pin sighted in at a very short distance... Once again, good thought, but as you shoot at longer distances the pins are moving in the wrong direction due to perspective (the target appearing smaller at distance).
I hope this helps you all grasp the concept better. It's tough to understand, but try not to over-think it. It's so easy to go test and it's easier to use than it seems. Just give it a whirl. You can be up and running with it in less than an hour!
Shoot straight!
Coop