Gt3555 vs. Beman 500's

[xtrema312]

From a couple sources I got the impression that these two shafts are the same for spine.  I have 500's tuned for my bow and just got some GT trad blems to try out.  The GT's seem to be a good amount weaker that the 500's.  I confirmed with bare shafting and then made up a makeshift spine tester, and I fount the same thing.  Does anyone know for sure if they should be the same?  What is the spine of the 500's and GT3555's?  I am wondering if the blems are off on spine or they just should be weaker than the 500’s.

[WESTBROOK]

The 3555 are supposed to be .500 spine, per GT website. The bemans should be .500, I have .400 bemans and they spine the same a 2117,.400.

Eric

[JRY309]

Like WESTBROOK said they have the same spine listed.But with carbons for me I always bareshaft them even when buying the same spine and same brand or different brand.

[chris K.]

I think that the 35/55's may be a stiffer. I shoot the MFX's occasionally.
Chris Kiefner

[Ironman43]

Wow what a coincidence.I've been tuning a new centaur carbon elite, with both GT 35/55 traditionals and beman 500 classics.Both cut to 29 3/4" the 35/55 tune with 50 gr. lighter up front than the bemans.Don't have a spine tester. Is it possible that the smaller diameter changes center shot making them shoot stiffer???

[xtrema312]

Originally posted by Ironman43:
Wow what a coincidence.I've been tuning a new centaur carbon elite, with both GT 35/55 traditionals and beman 500 classics.Both cut to 29 3/4" the 35/55 tune with 50 gr. lighter up front than the bemans.Don't have a spine tester. Is it possible that the smaller diameter changes center shot making them shoot stiffer???

I am shooting GT trad and 500 hunters both cut to 30 1/2".  I started there due to the GT's being that long uncut.  There is a dia difference, but it is not enough to make up for the difference I get in the way they tune.  I got the Beman 500's tuned with 200 gr. up front.  I am running about 75 gr. lighter on the GT's right now.  I don't have that shaft dialed in exactly yet so that number could change some, but I am in the ball park.  Everything heavier on the front was way weak.  I have only checked a couple shafts.  I am going to test all of them on my makeshift spine tester today to see if they are basically the same.

[Ironman43]

When you test them,let us know your findings please.Thanks, David

[JRY309]

Which Bemans are you shooting,the ICS or MFX.The ICS are the same diameter as the GT 35/55.The MFX are the smaller diameter like Axis.If you are shooting the MFX,that may be why they are tuning differently.

[tyee]

Okay let me try to help this I know as I work in a archery shop all day and have tested alot of arrows on the spinetester here is the deal a 35/55 gt trad is weaker without question to a gt 35/55 expedition arrow the 35/55 expedition does indeed deflect at .500 the trad doesnt it is closer to a 1916 which I think deflects at .619
as far as shaft labeled as seconds from GT I had a friend get five dozen from the dock of the bay
and the spine wasnt even close they where 55 75 and some were 400 some were 500 and 600 and every thing in between. So I really dont advise getting second unless you are making flu flu

[Lewis Brookshire III]

In my experience I think the Beman Classic MFX 500's are stiffer than the GT 35/55's.

[xtrema312]

Originally posted by JRY309:
Which Bemans are you shooting,the ICS or MFX.The ICS are the same diameter as the GT 35/55.The MFX are the smaller diameter like Axis.If you are shooting the MFX,that may be why they are tuning differently.

I am shooting ICS bow hunter shafts.  They mic about .04?? something smaller than GT trads.

I have been doing my spine test at 26" centers and 2#.  I am going to change to 28" centers and 1.94# this week, but what I found was the GT's ran about .04 more deflection.

[BigJim]

Tyee- I expect that the shafts that your friend got were very old or something other than the blems we see today. Years back, Gold tip (as did other) had a few issues with consistency which has long been solved.
Sipsey River, now BigJims Bowcompany has sold thousands upon thousands of these with nary a problem. Infact, normally we keep a waiting list of repeat customers that extends in to hundreds of dozens. The fact that your friend got 5 dozen bad shafts could only mean there was something fishy going on.
This year alone, I have sold nearly 1500 dozen with only one minor issue, which we promptly resolved.
Shoot blems in confidence, BigJim

[tyee]

so extreme that would be 540 compared to 500
thats the same differnce as 2117=400 2018=460
thats to much of a difference my dad shoot 35 55trads 30 inch arrow 125gn 45pound recurve ff string they fly great the alum he shoots are 1916
29.5 125grns fly and tune the same
 As far 5575Gt trad I cant remember I have one I can check on monday I will keep you posted
but here is what I have in my notes on other shafts
any beman or easton 400= 2117 or 78# of spine in a wood
500= are a tad stiffer than a 2016
or 61# spine in a wood shaft
340= close to 2317 and 97# in wood
3555 expeditions mimic 2016 or 60# woods
3555 trads mimic 1916 or 50# woods
5575 expeditions mimic 2216 or 81# wood as due carbon express 250
5575 trads I think fall in that catagorie as well
here is a example this on of my set ups
63# r/d longbow string 20 str 8125 cat whiskers
shoots 250 30" 125grn muzzy phantom
also shoots 29.5" 2117 and all 400 easton or beman carbons 125grn
also shoots 30"2314 and 2216 125grn
wood chundo 85-90# spine 31" 175grn len fisher b/h
see how all these combos have the characteristics
of deflection
will also shoot a alaskan bowhunting supply alaskan 29" with 65 grns remember the insert on those is 100grns!! so it will not paper tune or bareshaft with 125 at all it is 400 spine

[James Wrenn]

You buy seconds and you get what you pay for.Tyee is right about the flu flus as far as I am concerned.

[JRY309]

Beman ICS and GT 35/55 they use the same componets,same size nocks,same size points and inserts in both aluminum and brass.Both are your basic 5/16" carbons.Thats why I bareshaft tune all my carbons even when I order the same spine especially with different brands.

[Cupcake]

The 35/55 traditionals I have tested spine at .530", not the .500" claimed.  We have seen this on several different batches of 35/55.  The Bemans i have tested were .500".

[xtrema312]

Thanks for all the info.  From my preliminary testing I can make them work, but will not get all the weight and FOC I wanted when cut down as short as I can go.  I only got a half doz. to try so I guess they will make good practice arrows.  I may have to put some rope or weed eater line in them.

I have a doz. 5575's on the way for my new heavier bow.  I hope they work out a little better.

[tyee]

Big Jim, the blems bought by my friend were bought about 4 or 5 years ago