Please check this, arrow weight to bow poundage

[Lawrence Croeser]

Good Day,

I use a wheel bow, set @ 55 lbs with a 25 3/4" draw length. My arrow is a Easton Red Line 690 spine with a total weight of 256 grains.

If I read Eastons charts correctly I am well safe. Please advise.

Many thanks.............Lawrence

[puddin]

i thought it was recomended to have 5 grains per pound of draw weight.

that would mean a 275 arrow.

[Bruce]

Sounds abit light to me , I would check with barnsdale what there minimum arrow weight is

[Lawrence Croeser]

Good Day,

I have rechecked the Easton charts. The minimum weight is just under 200 grains. Unless I am reading the chart incorrectly. Not every one shoots a hard cam.

Check

Lawrence

[Eberbachl]

The generally accepted minimum arrow weight is 5gn arrow weight per pound of bow draw weight.

Your arrows are too light.

The minimum you should be shooting (based on 5gn/lb) would be 275gn @ 55lb.

If you have any concerns, you should not be referring to any Easton charts.

The Easton charts are irrelevant here regarding minimum arrow weight you should be shooting for your bow!

You should check the bow manufacturer's recommendation for their bow.

If they don't have a published minimum weight, email them and ask.

[Marcus]

What is your point weight?

[Aechmea]

The Easton charts are irrelevant here regarding minimum arrow weight you should be shooting for your bow!



Exactly.

The Easton charts are not intended to calculate a minimum arrow weight. The info in the Easton charts is to assist in selecting an arrow shaft with the correct spine (not weight).

When you have a selection of models of shaft that may be suitable spinewise, then you can further select on the basis of intended use, diameter, mass, aluminium or carbon, points, inserts, knocks, fletches, whatever .

Using your info supplied I came up with Easton Target Arrow Group T4. Redline 690 is indeed in that group but it is also one of the lightest at 6.3 grains per inch. A heavier shaft will get you closer to the 5 grain per pound rule-of-thumb if you need to shoot at 55lb.

Or alternatively, if you wound the poundage down to 50lb, redline 690s would still be OK for spine and you would be very close to the arrow weight low limit (50 x 5 = 250 grains).

[James Park]

I am going in the opposite direction - trying to use very heavy arrows.
They are nicer to shoot, easier on the bow, and drift less. My FMJs are 420 grains, which is excellent.

[Aechmea]

Well thats right. I am trying to get Lawrence's arrow weight up into more reasonable levels.

I did have a bit of a giggle to myself though because I have the reverse problem to Lawrence. I have a 31" draw length and shoot a whimpy 42lb, so it is impossible for me to find a light enough arrow and retain correct spine!

324 grains at 42 lb = 7.71 and thats with Lightspeed shafts (Easton's lightest!). I don't think I have a dry fire problem!

[puddin]

im shhoting 370 grai triples out of a 40lb recurve and i can shoot 90m easy with the sight halfway in.

i like the higher weight. i seem to score better.

[James Park]

The "x grains per pound" thing is just a rough rule.
The real thing that matters is how much of the stored energy the bow needs to dissipate each shot.
The stored energy is shared between the arrow and the bow in proportion to the ratio of the arrow's mass and the bow's virtual mass. As the arrow mass decreases, the bow takes a proportionately greater share.
Also, as the bow's draw weight increases, cam profile becomes more aggressive, and brace height decreases, the stored energy increases markedly.
Hence, the energy the bow needs to dissipate becomes greater for:
- longer draw lengths
- higher draw weights
- lower brace heights
- more aggressive cams
- lighter arrows
If you push any of these to the limits you are stressing the bow more and ultimately are more likely to break things.
I think it is a much better approach to be conservative in all of them (although of course your draw length is something that is fixed by your size).
Also, pushing them to the limits, in my experience, does not promote higher scores, but often the reverse.
In most cases, a heavier, smaller diameter arrow will be more accurate than a light-weight arrow (and will also be much nicer to shoot and quieter).

[Eberbachl]

In most cases, a heavier, smaller diameter arrow will be more accurate than a light-weight arrow (and will also be much nicer to shoot and quieter).

My 575gn X7's are sweet :D

My 382gn Target arrows are OK, but I'd be happy if they were a little heavier.

:thumb:

[James Park]

For a target arrow, my approach is to select the smallest diameter, heaviest arrow with which I can get adequate sight clearance at my longest distance. That will be the arrow that will drift the least, have the nicest feel to shoot, and be easiest on the bow and its fittings. Much as I hate the term, I think it will also be the "most forgiving".
For marked distance field rounds, I would use that same arrow.
Excessive arrow velocity from using light weight arrows does not help at all for either of those uses.

Of course, the selected arrow does also need to be a good match for the bow.

[reversehaven]

Excessive arrow velocity from using light weight arrows does not help at all for either of those uses.

hmm. i'm just wondering. what would be 'enough' arrow velocity?

[Lawrence Croeser]

Please understand I am not trying to get the lightest possible arrow, my criteria is as follows;
Draw length 25.75 can't change this.
Draw weight 54- 55 lb would like to stay here.
Wheel bow do not want to change this.
Brace height 7 3/4"
Arrow shaft length 24 1/2" correct arrow length.
Spine according to AA is a Redline 690 I am waiting for X7.
Point weight 82 - 100.
FOC 12.3% at 82grain point
FOC 14.8% at 100grain point (is this a bit high?)

If a shot a hard cam bow with a 31" draw length at 55lbs with a 6" brace height suggest 5grain / lb, would you still suggest 5 grains per pound. I am sure I will be safer with my setup at 4.7 than that of 5 with the hard cam.

Easton has a chart which show minimum arrow weights for different bow types and draw length, for my set up the minimum is under 200 grains which I am well over. (Last page of their tuning guide)

Regards..........Lawrence

[Bruce]

We have all agiven our opinions as aasked by you , it seems your mind is allready made up .

Good luck with your decision


Bruce

[Lawrence Croeser]

Bruce,

What other carbon arrows are available at approx 600 -690 spine ? I am still on a quest to find the correct arrow, my choice is limited at my set up. Maybe you could make an arrow sugestion.

[Bruce]

You could look at the goldtip range in there top end , also what weight points are you shooting

[Eberbachl]

Please understand I am not trying to get the lightest possible arrow, my criteria is as follows;
Draw length 25.75 can't change this.
Draw weight 54- 55 lb would like to stay here.
Wheel bow do not want to change this.
Brace height 7 3/4"
Arrow shaft length 24 1/2" correct arrow length.
Spine according to AA is a Redline 690 I am waiting for X7.
Point weight 82 - 100.
FOC 12.3% at 82grain point
FOC 14.8% at 100grain point (is this a bit high?)

If a shot a hard cam bow with a 31" draw length at 55lbs with a 6" brace height suggest 5grain / lb, would you still suggest 5 grains per pound. I am sure I will be safer with my setup at 4.7 than that of 5 with the hard cam.

Easton has a chart which show minimum arrow weights for different bow types and draw length, for my set up the minimum is under 200 grains which I am well over. (Last page of their tuning guide)

Regards..........Lawrence

How many times do I have to say it.

The Easton chart means nothing in this context.

If you want to know the minimum safe weight for an arrow out of your bow, ask the manufacturer...

Of course, the 5gn/lb is a general rule of thumb, and a very radical high energy hard cam bow will be "softer" on components than a wheel bow.

If you're not going to listen to replies, why ask the question?

[Lawrence Croeser]

I THINK I AM BEING MISUNDERSTOOD

I do not know that a radical cam is softer on your bow than a wheel bow. I would have thought differently. I am listening to the replys carefully. Speed is not my objective, x's are.

I cannot buy a spine of 600 plus in this country. I have to import my arrows. I use AA to get me as close as possible, and for waht ever reason AA is just not corrolating with physical tests. I am so tiered of buying arrows and this is why I am asking the questions.

I would like to get X7s due to the weight.

Could you on the above specs suggest spine, point weight etc. If not how can I go about getting the correct spine. How much lee way does one have with spine.

I am trying to get this correct.

Many thanks..................Lawrence