I need a 750 gr FINISHED weight ALLUMINUM arrow

frassettor · May 28, 2013, 05:25:00 PM

I need to get a finished aluminum arrow that weighs aprox 750 grains out of my setups listed below. Can you please point me in the right direction as far as what size shaft, tip weight, ect. Thanks fellas

frassettor · May 28, 2013, 05:54:00 PM

Bladepeek · May 28, 2013, 06:00:00 PM

Those weight bows are way over what I shoot, so I can't help you there. If you have a set-up that shoots well, you can plug it into Stu's spine calculator and see what the dynamic spine shows up as. Regardless of whether it shows weak or stiff in the calculator, if it shoots well for you, you can then plug in different shafts, lengths, points, etc to find something with the same dynamic spine which will give you 750gr total weight.

Blaino · May 28, 2013, 06:12:00 PM

I'd start with 2219's since they are 13.8 GPI. You'll be able to make the rest of the weight on the front end.

Bud B. · May 28, 2013, 06:14:00 PM

My guess is start with a 2219 shaft. 400 gr at 29".

Build your side plate out to match the underspined (static) arrow below. But it misses your desired weight. Tinker with brace height also for tune. Notice the string is B50. If you have FF you'll be quite underspined.

You might even want to contemplate longer internal carbon footing to increase weight and stiffen arrow.

Good luck.

sticksnstones · May 28, 2013, 06:14:00 PM

I've been playing with an aluminum setup that you might be interested in, although I haven't perfected it just yet. I shoot 2020s out of my 64# PLV so I'd think this should be ballpark helpful info for you.

First I start off with a Legacy 2020 that gives 13.5 gpi,full length of 31.5" is 425 grains.

Next I'm footing it with 2.5" of a cut down 2215 for 30 more grains up front for 455 grains.

Then I don't like glue on nocks, so I cut off the cone and put on a uni bushing for a 2413 and a super nock. This and 4x4" fletch gets 33 more grains on the back end for 488 grains.

Instead of a screw in adapter and screw in heads, I'm planning on going to a brass one piece adapter. If I can find a 75 grain adapter that fits (and hopefully still use my 225 grain glue on heads) it will put me at 788 grain total arrow weight at 13.0 GPP.

I'll be interested to see what other guys have come up with for heavy aluminum setups.
Thom

Bud B. · May 28, 2013, 06:21:00 PM

2317 is your next choice with FF string. 29.5" arrow. 300 up front. Total arrow weight is about the same.

Bud B. · May 28, 2013, 06:24:00 PM

Oh, if the internal footing is used, use 2117 shafts footed inside with 35/55 GT Trads. 2216s with 55/75 internals.

Bud B. · May 28, 2013, 06:26:00 PM

And please let us know what you end up using and how it works.

frassettor · May 28, 2013, 06:31:00 PM

Thanks a lot! I will give the 2317 a try and let you know

Skipmaster1 · May 28, 2013, 06:37:00 PM

Is there a reason you don't want to use carbon? You could get an arrow there pretty easy

Trumpkin the Dwarf · May 29, 2013, 11:47:00 AM

Methinks (if you wanted to use carbon arrows) that GT 5575 traditional shafts, trimmed/tuned to the point weight, with a brass insert(100 grains) and a 250-265 grain point. would get you very close to 750 grains.

I can't help with aluminum arras, but thought I'd suggest an alternative, just in case.

3arrows · May 29, 2013, 12:06:00 PM

2020 or 2117 take insert out pour coffee in and tune to length.

tecum-tha · May 29, 2013, 12:39:00 PM

Lets say you want a 29.5" arrow BOP, assuming a 28" draw. You need an AMO wood spine of about 75# using a 125 grain point.
2219 Easton @ 13.8 grain/inch makes a 407 grain shaft. Plus nock and fletching makes about 460 grains.
Spine:2219 Easton has an equivalent AMO spine of 93# @28". Deduct about 7 pounds for 1.5" arrow length over 28". Makes about 86#. Deduct 4-5# for every 25 grains point weight above 125 to get to 75#.It will most likely be between 175 and 200 grains.
Right now, we're at around 625-660 grains.
Fill arrow with tight fitting nylon rope which you glue to the back of the point insert. It needs to fit tight inside and should be braided (which makes it heavier). Weigh 4 inches of the stuff on a grain scale and calculate grains/inch. Cut to required length to achieve weight desired. You can fill full length, but filling the first third or 2/3 will give you a better FOC. Rope does not effect spine, becasue it has no stiffness like tubes etc. A roll of $6 rope does about 2 doz. arrows.Enjoy some heavy hitters :-))
That is also a great way to weigh up the cheap and stiff "non" traditional shafts for traditional bows... I guess that you look into aluminums becasue they are inexpensive. The thickwalled shaft should be of benefit,too.

cacciatore · May 29, 2013, 01:04:00 PM

I have used for long time the 2219s cut at 29" my exact Dl and with bow of 65# they were perfect with a 145 grs point,so even if you need to use an heavier point for your lighter bows,say 165-175, you still will finish with a little too light arrow. You can use some filling material to add weight without changing too much the spine.2317 and more 2419 will require much more weight up front so will end in the weight you want,but with a much larger diameter.

May 29, 2013, 02:35:00 PM

2018s and 2020s with plastic weight tubes.