IS IT POSSIBLE

[ComfyBear]

Here's another one that even has a diagram.


http://home.att.net/~sajackson/archery9.html

[LoneWolf]

Yeah, that one explains it a little better too.

[TYE]

My Carbons balance at 13" and my Aluminums balance at 12". What would 12" be?

[ComfyBear]

My Carbons balance at 13" and my Aluminums balance at 12". What would 12" be?

With a 20" bolt every inch front of center would equate to 5%, so 12" from the back of the bolt (2" foc) would be 10% FOC

[Hawkeye]

OH yes, I"m using the same arrow , then shooting it again.
I'm dead center at 20 and 30 time after time, same hole.....40 yards pretty good also....but at 50 yards I'm low about 3 inches and to the right by 4 inches. So if I adjust the scope windages for 50 I cam be right on at 50 yards......but now when I come back to 20 and 30 yards , I'm shooting high and to the left by a couple inches. Guess this is all arrow flight that cannot be corrected ?
BOB

One other thing to check besides you rest/checkweld that Gutpile mentioned, is to make sure the scope is exactly level. If it's off by just a fraction of a degree, at 50 yds that can throw your windage off too.

[ComfyBear]

Hawkeye, I think you hit the nail on the head. If the scope isn't perpendicular it would not only affect windage, but evelation as well.

Seeing that BOB states that he is hitting low and to the right, more than likely, his scope could be canted slightly to the left, which means that when he compensates and makes it perpendicular, the POI will be to the right and low.

[BOB7255KHZ]

Hawkeye, I think you hit the nail on the head. If the scope isn't perpendicular it would not only affect windage, but levelation as well.

Seeing that BOB states that he is hitting low and to the right, more than likely, his scope could be canted slightly to the left, which means that when he compensates and makes it perpendicular, the POI will be to the right and low.

Yep fellas , I thought the same thing.....like my scope wasn't mounted true, but the Excalibur dealer put it together for me....he stuck some sort of calibration gizmo on it ( white card/ black #'s).....also put locktite on the needed screws.
Tomorrow I'm gonna start all over....put my fps ring around 300 or close...zero dead center at 20.....then go to 30 and adjust the fps ring to move up or down......then see what I have at 40 without touching nothing...and if I'm close I'll see what 50 brings.
I know this is gonna be my hunting xbow knowing well I'll never take a 40 or 50 yard shot at a deer.....nope. I shot about 100 times in two days ....my arms starting to look like Arnolds.
Iwant to thank each of you for all of your help, very interesting indeed. BOB

[Big John]

Bob7255khz:

Are you shooting indoor or outdoor?
At 50 yds. even a small breeze will affect your trajectory.
I totally agree with the cheekweld and ease into hold position
shoot.
I am also thinking that to obtain what your looking for might require a lighter bolt , maybe 375 gr. total.
All my bolts are 15% FOC, I believe this to be almost perfect for twenty in. bolts. Also fletching may play a role in the longer 50 yd. shots.
A little experimenting may be in order to achieve your goal.
I have never tried that, but I am hoping it can be done.
Keep trying!

John

[arbalest]

Realistically, I think the only way to do it is to shoot the SAME bolt three times, indoors, with no ventilation. I think there is too much variation, dynamically, between different bolts. No matter how careful you are when building the bolts, there will be minute variations in the location of the fletching, the amount of glue holding the fletching, the length of the bolt, the amount of glue holding the inserts, etc. All these variations affect the dynamics of the bolt flight. So...I think your only chance of putting three bolts into same hole, is to shoot the same bolt three times. Even then I'm not sure you can control all the variables. If you are trying to put three bolts into the same hole, even out to 20 yards, there are too many things that can affect the bolt flight. It wouldn't take much air movement to move a bolt some significant percentage of a bolt diameter, which would ruin the attempt. Just my $.02, YMMV.