No pattern with broadheads?

[Dry Bones]

I have been bow hunting for a few years now and have had a lot of help along the way, but this one has me stumped pretty bad. I had new strings and cables put on my bow Friday. Did my best to break them in with a bunch of arrows since. Late Yesterday I was dialed in to 60 yards with practice points and having no issues. I put my ever faithful thunderheads on and things went South. Looked ok at 20 yards, but beyond that they were everywhere. Tried a set of mechanicals I had, (spitfire type), no dice there either. Bow is Bear Advantage Hunter (basically the showdown model) and scales 73# @ 27" draw.
Arrows are GoldTip Velocities. I used the same combination before, being thunderhead 100 grain on these shafts for my last trip and everything shot well. Any suggestions? As a side note, my 20 yard pin basically stayed the same but the rest had to be moved up a good bit. New string and cables shot almost 6 inches high at 40 yards compared to the original set-up. Thanks in advance.

-Bones

[hoyt21]

So your left and right is good. But you are vertical stringing?

[oktx]

Is your bow back in spec now and your arrows are too weak?

[Dry Bones]

Hoyt 21, no when I put the broadheads out there, it's a toss up where they will go, horizontal, and vertical. OKTX, I am shooting a 340 spine arrow but I never thought about that... The velocities are much lighter in weight (grains per inch), and shooting them a little long. I believe that is the next investigation.

-Bones

[muddyfuzzy]

Could be a cam starting rotation issue with the vertical missing

[Rat]

Check that your bow is in spec's (axle to axle and brace height) and the cam(s) are in time or synced if a single cam.

Make sure the limbs are bottomed out or turned out the same number of turns.

Check the center serving and D-loop make sure there is no loosening or slop.

If all that was changed was the string/cables that's where I would start looking for the problem.

I would be pretty surprised if the arrows are too weak now. Just changing the string/cables isn't going to make that much of a difference in energy delivered to thew arrow; that is assuming everything else remained the same.

If you are shooting a fall away rest check this too.

Depending on the string maker they may not be pre-stretched; this is why there is a shoot in period recommended. Now the string/cables are shot-in (read stretched) and may need to be twisted up to get the bow back in spec and the cam sync correct. It is best to press the bow and measure the string/cable off the bow, but you can check brace height, axle to axle and cam sync to do the same thing.

I guess I would check everything that has to do with the string/cables. But I would do that anyway; when I put new strings on I start at zero and re-tune the whole set-up.

[LeanMachine]

Spine issues is easy to rule out. Shoot a bare shaft with your fletched shafts and see if they group together. If not, you have spine issues/nocking point issues to sort out.

[Dry Bones]

Bare shaft paper tuned perfect, fletched hit the same mark with clean holes. I have 60X strings and cables now and have noticed no creep or stretch at all. I shoot recurves a lot and tie my own from B-50 Dacron. I am all to familiar with creep. It is a single cam and when the proshop restrung it, they checked the rotation of cam as well, and the limbs are bottomed out. They also put tie in nock points on both sides of the nock then tied the D-loop outside of such. I think this gives a more uniform set and less chance of slip? Currently shooting a whisker biscuit rest. Verdict is still out on that thing. I have not yet pulled the specs and verified the length and brace height. Thank you for that. Sometimes I have to be told to reason problems out instead of getting frustrated.

[Steelforce 15]

Dbl check your limbs to make sure you don't have hair line cracks, my bro's started shooting erratically and his limb finally broke close to his lower cam, this was on a brand new bow.