Are the Heritage 150s Right for me?? Correction

[RidinMyK2PastU]

Hi,

I have been working on tuning my bow lately. It is a Zipper standard with D97, 45# at 28" and I draw a true AMO draw of 28.25". I would like to keep my arrows at not shorter than 30" due to broadhead clearance. I would also like to have a finished arrow weight of about 475 to 500 grains.

Here are my results.

Goldtips 3555 Traditional are too weak even when cut to 29.5" BOP and a 100 grain point, and standard insert. (Note: I can switch to a B50 string it the arrow shows slightly stiff, but I would like to shoot D97.)

Goldtip 5575 Expedition Hunters are too stiff when cut to 30.5" BOP and 175 grain tip with 100 grain brass insert.

Wood shafts, 11/32, 30" BOP 65-75# are weak with 125 grain point.

So, should I try the CX heritage 150s since they are in the middle of the two, or should I get new 5575 and try them cut longer?

Thanks so much for the help and the suggestions.

Kevin


  NOTE: Correction to above information. I thought the 3555 arrows had standard inserts, but they actually had weights screwed into the backs of them, making them 50 grain inserts. I am now shooting the standard inserts, and 100 grain points the arrows now tune well, but they are still too short and too light.  

[JRY309]

CE 150 has a spine of .487 and GT 35/55 has a spine of .480,they are pretty close in spine.A 55/75 may be your best bet and start at full length and trim and tune from there.If 35/55 are weak with standard insert and 100 gr. point,the 55/75 may work better.Or you can build out the side plate alittle to see if the 35/55 will work to.Carbons just don't come in as many different spines as wood or aluminum.

[R H Clark]

sounds like you are getting some false readings.I think your 5575's with the longer shaft and added weight should actually have a weaker dynamic spine than the 3555's.

Try building your sideplate out a little.You should be able to shoot either a 3555 for a slightly lighter arrow or the 150 for a little heavier arrow.Stay with the standard insert though and start testing at full length.

[grizzlyxx]

The ce 150 should work for you with 175 up front.  I'm shooting 44@28 ma widow and have about the same draw length as you. I also could not get a 3555 to spine.  Shot a 5575 at 31 inches in length with 250 up front and still to stiff.  ce 150 between 29-30 inches with 175-200 up front.  be sure to cut just a little at a time of, quater of inch makes a big difference on a carbon shaft.  You are going to end up closer to around 520-540 grains when finished.  Good luck.

[Cherokee Scout]

The 150 should work well.

[KentuckyTJ]

Can't believe the 3555's are too weak. I've shot them from much heavier bow's than 45 lbs. with great success. Must be a release issue.

[RidinMyK2PastU]

Thanks for the responses.

I don't think it is release issue or false readings. Like I said before, the 3555 shafts at 29.5" and 100 grains with standard insert shoot weak with a D97 string, and stiff with a B50 string. That would rule out a release issue or false readings. I can consistanly see the same results. Nock right with B50, and Nock left with D97.

Please continue to give me some ideas.

Thanks,
Kevin

[jmc334]

Weight tube insert to stiffen the spine on the weaker arrow?

[RidinMyK2PastU]

Corrected the above information. I made a mistake with the 3555 insert weight.

If I could come up with the same spine setup as the 3555 with standard inset and 100 grain point at 29.5, but with a longer shaft and at least 125 grain points, that would work well.

Another thing, I thought the 150s were stiffer than the 3555 shafts??? I guess I am wrong again. Getting good at this.

[Jack Whitmire Jr]

I'm no expert- far from it. But with the readings on a 65-75 shaft showing weak I think you are getting false readings also.

I  think the goldtips would/should work 35/55 or the hertiage shafts in the CX 90's with a  heavy point- 175 grain.

But everyone is different:)

[ishoot4thrills]

You can't reach a conclusion concerning arrow spine based on nock position only. I recommend trying O.L. Adcock's website on tuning with bare shafts and the impact of their grouping as it correlates with your fletched arrows:  http://bowmaker.net/index2.htm  

Just my opinion.

[RidinMyK2PastU]

Ok,

If the point hits left of the fletched shaft, and I see the nock traveling right during flight, that is a stiff shaft, correct? This is what I see with the 5575 and the 3555. But the 3555 only when shooting a B50 string.

And, If the point hits right and nock is traveling left during flight, that is a weak shaft, correct? This with 3555 and any point weight over 100 grains.

And, if changing the tip weight of the 65-70# wood shafts increase or decrease the point to fletched shafts error, such as changing from a 125 to 100 the point gets closer to fletched shaft and less side to side kick, that is a weak shaft??

These are the symptoms i am seeing.

I have read that resource, and I was trying to use a combination of methods to verify the results.

[ishoot4thrills]

Nock position is a poor way to read arrow spine, too many variables involved in that method. Use group position of bare shafts verses fletched ones.

   

[dino]

3Rivers sell a test kit of carbon express shafts with 2 shafts of each size (90,150,250,350).  Actually testing that particular shaft out of your setup is the best way to know wether it is going to work or not. dino

[metsastaja]

Read OL Adcock webpages on arrow tuning.

 http://www.bowmaker.net/tuning.htm

Worked great for me.  I also used the CE test kit.
Quickly discovered I needed the 250's not 150 for my 54@28 with a 29" draw.

I ended up with 250's cut at 30" with 100g brass insert.  During the prrocess I shot 125 145 and 175 field tips.  Yesterday started field tip and BH testing.  Great grouping out to 20 yards.

I must be one of the lucky ones. MY hunting setup is now 100g brass insert, 100g screw in adapter and a 125g glue on Magnus 2 blade.  I am getting consistent 5" groups at about 20yards shooting a mix of BH and Field tips. Except when I screw up.  The BH are getting incredible penetration. Glad I have a second backstop.
 
 

[Shawn Leonard]

Sorry but the 150 will be way stiff even if ya leave them at 30"s and add 225 up front, you would need 325 up front and than they would weigh to much for ya. The carbonwood 2000 at 30"s with 225 up front should be about perfect for ya and get ya around the 475 arrow weight, but you are way off on your other choices. Shawn

[traditional beagle]

Gold tips 35/55 with 50gr. brass inserts work good for me with 45# to 55# longbows. Full length. Can't see them being underspined with you cutting them off.