Heli-m Tuning questions

[J-Fish]

Long Story short, been shooting my bow indoors or on cloudy winter days. Had it out in the bright sunny afternoons here lately. When I shoot at 30 or 40 yards i can see the back of my arrow swirling around. At first it looked like it was probably a 12" diamater circle.

Shot it on paper and the point would enter the paper about an 1 1/2" to 2" below the feather. Took it to local shop and they twisted the cables on left side and got it centered, then moved my knock point up or down until it got within an 1/2" or so.

Today shooting it at 40 to 50 yards and I can still see the back of my arrow swirling around.

Questions:

What do you think the cause is?

What should I expect on the paper test?

I would not think that the knock point on the string would change much from where the square said it should be. Don't you think this is wrong?

Could arrow be the cause?

Notes: I think it became a little more accurate after the tuning, but I wonder if it still needs more adjustment....

6 month old Heli-m
probably shooting 65 lbs
First compound in 20 years, recurve and long bow between compounds....


Thanks to all!

[J-Fish]

please look past the bullet holes That was another day of fun..

[Loneaggie]

What type of rest? What draw weight? What spine arrow? How long are the arrows?

[J-Fish]

Whisker Biscuit
65 or close to it
Draw length is 29.5 I think
Arrow length is 30"

Factory arrow info:

Gold Tip Expedition Hunter
7595/340
Size / Straightness 8.9
Weight GR/IN 8.9
Weight@29'' 258.1 gr.
Spine .340"
Length 32"
O.D. .300"
I.D. .246"
Recommended Point Weight 85-125 gr

[popup_menace]

You may want to look up the paper tune chart to see what you can do to fix this. There are quite a few online. Also, the WB MAY be throwing off you arrow if not set up exactly right. I had the same problem with one and switched to a drop away, and I never had another paper tune problem after that.

[jathomas437]

Google the method to "walk back tuning". Provided your bow specs are correct, this method will get you where you need to be.

[Loneaggie]

What is your nock point currently at? Arrows look good for your length and weight.

[J-Fish]

I can't remember if they moved my nock point up or down, but it's out of range from what the square said. I thought you always went off the square.

It was a round square also, for WB's

[Loneaggie]

I can't remember if they moved my nock point up or down, but it's out of range from what the square said. I thought you always went off the square.

It was a round square also, for WB's

Your nock point should be very close to 1/8" above dead center depending on arrow diameter and form.

[Quackedup]

All of the tears show that the nock is flying above the tip. The nock point should come down to fix those. The left tears are not consistent, may be form, and may be the rest is slightly off. Make sure that during arrow rest or nock point adjustment, that the arrow still cuts the burger hole. Just in case, the burger hole is the threaded hole to used to mount your rest to the riser of the bow. Biscuits aren't the best for paper tuning. Walk back tuning may be a better way for you to tune. usually Heli-M's come into tune about 1/8th inch nock high give or take.

[JerryR]

Take a pic of your cam timing for us.

[J-Fish]

They always start off square and then start adjusting until it gets a mile out where you can see it's off with the naked eye. The speed square just confirms and hopefully relays it better in the pix.

I think there is something off in the cam or adjustment there

I will say this, as far out as they have it, it shoots better now then it ever has.

Still dragging a rip in the paper about 3/4 to 1"

[J-Fish]

[J-Fish]

I would say a split 3/4" to 1" out today after tuning.

Is this acceptable? I don't feel that it is. Am I asking too much?

[JerryR]

Still need a pic of your bottom cam.