Traditional Archery Discussions on the Leatherwall


XX75 Spine Suggestions

Messages posted to thread:
KSlongbowhunter 15-Oct-21
M60gunner 15-Oct-21
Viper 15-Oct-21
KSlongbowhunter 15-Oct-21
M60gunner 15-Oct-21
Jim 15-Oct-21
Viper 15-Oct-21
KSlongbowhunter 15-Oct-21
782GearUSMC 15-Oct-21
SB 16-Oct-21
Wapiti - - M. S. 16-Oct-21
aromakr 16-Oct-21
Therifleman 16-Oct-21
Rooty 16-Oct-21
Pdiddly 16-Oct-21
longbow1968 16-Oct-21
Rooty 16-Oct-21
kstradhunter 15-Nov-21
Corax_latrans 15-Nov-21
Stix 15-Nov-21
Stix 15-Nov-21
kstradhunter 15-Nov-21
George D. Stout 16-Nov-21
Altitude Sickness 16-Nov-21
CrowFoot 16-Nov-21
kstradhunter 16-Nov-21
kstradhunter 16-Nov-21
reb 16-Nov-21
Flinger1 16-Nov-21
bowhunt 16-Nov-21
kstradhunter 16-Nov-21
Jimmy 16-Nov-21
Corax_latrans 16-Nov-21
kstradhunter 17-Nov-21
kstradhunter 17-Nov-21
Flinger1 17-Nov-21
Stix 17-Nov-21
Riverwolf 17-Nov-21
kstradhunter 26-Nov-21
From: KSlongbowhunter
Date: 15-Oct-21




I am setting up a new ilf bow and wanted suggestions from those of you with experience yet again. Setup will be a Samick Discovery riser which is cut around 3/16 past center, 45lb @ 28in recurve limbs drawn to right at 28.5, ff string shooting off shelf with accutune or similar homemade setup. Was curious what spines you would recommend testing first. Will be used 3d and hunting so dont want a crazy heavy arrow, maybe 10-12 max gpp. Was thinking 2016 as one test spine.

From: M60gunner
Date: 15-Oct-21




2016 is a good start. 1918 is another. With a bow cut past center shot that much you can get away with some combo’s that might not otherwise work. Also leaving the arrow real long helps. 2018 is heavier and probably would work at hunting ranges but might come up short on a 3D course unless the shots are under 25 yards.

From: Viper
Date: 15-Oct-21




K -

If you know how to tune a rig, you're looking at a 1916 with a std weight head.

Viper out.

From: KSlongbowhunter
Date: 15-Oct-21




Viper that was another one i was considering trying though i didnt know how light i would end up. So far ive only shot with longer arrows using gap but im not ruling out going shorter if needed for a good setup. As far as knowing how to tune im familiar with most aspects of it and did pretty good with my last setup.

From: M60gunner
Date: 15-Oct-21




I use some old 1916 GG’s from my Bear TD , 45#@28 limbs. Think I have 125 grain tips on them. I just acquired a couple doz NOS AO XX75 1913 I am thinking 3D and field round arrows. Like the author of this thread I am experimenting at this weight especially with aluminums. My first aluminums were 2020’s for my 55# bow.

From: Jim Compton's Traditional Bowhunters
Date: 15-Oct-21




2016 or 1916

From: Viper
Date: 15-Oct-21




K -

For every 2" you go above 29" (arrow length), go down one spine (stiffer). If 1916 @ 29" works @ 29", then a 31" 2016 should as well.

By bad, I should have asked your preferred arrow length.

Viper out.

From: KSlongbowhunter
Date: 15-Oct-21




Viper, no problem. Right after i posted i thought about that i should have included that. I appreciate your input greatly as well as the others here who have commented! Thank you guys!

From: 782GearUSMC
Date: 15-Oct-21




2016's w/125 grain head Plenty of room to tweak the dynamic spine.

From: SB
Date: 16-Oct-21




I shoot 2013's out of 45#

From: Wapiti - - M. S. Compton's Traditional Bowhunters
Date: 16-Oct-21




2016 or 1916

From: aromakr Professional Bowhunters Society - Qualified Member
Date: 16-Oct-21




Hate to disagree with everyone, but I would recommend a 2018 its a little heavier than you wanted, however by building the strike plate out about a 1/16" a 2016 will work.

Bob

From: Therifleman
Date: 16-Oct-21




M60gunner X2.

From: Rooty
Date: 16-Oct-21




I agree with 2016. Samick riser should preform well. Flinger1 has one.

From: Pdiddly
Date: 16-Oct-21




I agree with 1916 with 125 grain head…I would cut them to 29-29.5”.

2016 is simply too stiff except if left full length with more point weight.

All I shoot is tin arrows and have set up many bows with them, so an informed opinion.

From: longbow1968
Date: 16-Oct-21




Full length 2016 for gap shooting; adjust tune with tips.

From: Rooty
Date: 16-Oct-21




Your riser is a modern riser not vintage. My set up on a hoyt 45# is 28" 500 spine with 200 tip. Aluminum in 500 spine is usually weaker than carbon. 125 grain tip is old school. In my findings with modern risers are 2016 will work at a tuned length of your testing from 125 to 200 grain.

From: kstradhunter
Date: 15-Nov-21




Gonna bring this back to top, ive got this combo down to 47-48lbs at my draw and only have room to go up if needed. Would like longer arrows in 31-32in range. so curious if everyones suggestions still stand?

From: Corax_latrans
Date: 15-Nov-21




At that draw weight, I shoot a 28” 1916 and can get an 1816 to shoot well bare- shaft. But that bow is cut a bit before center, not past. If you want/need a longer arrow, I could see 2016 shooting well enough.

JMO buy 4 Tributes in 2016 and 4 in 1916, fletch half of them and go play.

From: Stix
Date: 15-Nov-21




I ran your numbers through the 3rivers spine calculator. Being cut 3/16 past center and drawing 28.5" really adds up to a stiffer arrow on the calculator. I assumed a 30" arrow, 125 grain point, and it's recommending a 2117. Run the numbers yourself. Just Google 3 rivers spine calculator.

From: Stix
Date: 15-Nov-21




I also just saw you're using the accutune, so your not really shooting 3/16 past center, so I agree you can get to a 2016/2018 range by moving the Accutune out

From: kstradhunter
Date: 15-Nov-21




Stix, i am leaning towards trying a 2117 and hoping for best. It would put me right around the 550gr total i would like, while leaving full length at 31.5.

From: George D. Stout
Date: 16-Nov-21




A 2018 is nearly the same gpi as a 2117 and a narrower diameter for easier tuning. No benefit from 2117. But alas, I don't know where the tuning apparatus come from, but 2117 wouldn't be on my experience calculator at all, and I've been using aluminum since the 1960's. It would tell me a 2016..at 29.5 to 30", at 10.6 grains per inch and a 125 5o 145 grain tip to get you to that mystical 10'ish gpp.

From: Altitude Sickness
Date: 16-Nov-21




For similar set ups of mine 1916, 2016, 2018 work and all Will shoot fine. But I find a 30” 1916 to fly better out of bows close to your specs

Of course that’s my release and anchor point your results may vary

From: CrowFoot Professional Bowhunters Society - Associate Member Compton's Traditional Bowhunters
Date: 16-Nov-21




I'm shooting 31 inch 2018's out of my set up. 51 lbs at 28, they fly great with a 145 grain point. I am shooting 165 grain Simmons land sharks for my broadheads and I can tell no difference. I ended the year shooting them on the 3D shoots because I planned to hunt with them. They performed really well.

From: kstradhunter
Date: 16-Nov-21




Thank you all for the updated input after my update. Just trying to save a little time and money with the tuning process. Im shooting a 500spine carbon currently at 32" footed with aluminum and it seems to show weak still so figured id get input again since i havent shot aluminum before.

From: kstradhunter
Date: 16-Nov-21




I will go with full length 2016 and cut it down until it tunes well.

From: reb
Date: 16-Nov-21




1919-2016

From: Flinger1
Date: 16-Nov-21




What’s it do with a full length carbon minus the footing and what are you using for a strike plate now? I’m using felt furniture pads as both the shelf and strike plate and my discovery shoots absolutely lights out! IMO, the discovery is one of the best deals in archery.

From: bowhunt
Date: 16-Nov-21




Some of these aluminums are no longer made unfortunatly.

I would choose the 2018 as well over the 2117.Its an excellant hunting shaft due its smaller dimeter and wall thickness and weight.I it tunes for you that would be a great shaft for you.

I would get 125,150 and 175 grain points for your tuning.

One no longer made that would be similar is the 1918.

2016s and 1916s are always in the picture for 40-45 pound bows in my experience.I play with point weight and length from 29 inches to 31 inches.I draw 28 inches approximatly.

From: kstradhunter
Date: 16-Nov-21

kstradhunter's embedded Photo



Flinger1 i had doubled up leather sideplates with a rug shelf pad. Picked these bolts up with velcro soft side to try out if needed. I think i have a couple shafts without footing on them. I will shoot them this evening and see how it does for reference.

From: Jimmy
Date: 16-Nov-21




2016s all day long

From: Corax_latrans
Date: 16-Nov-21




500 is supposed to be the equivalent of a 2016… so if it’s working, it’s working.

I just have noticed that at 28 inches arrow length and low-mid #50s, I simply cannot shoot a 2018 or 2117 from a #55 @28”. I tried really hard for years, but I just didn’t have the horsepower. 2016‘s solved a whole lotta problems for me!

Length is a big issue, of course

From: kstradhunter
Date: 17-Nov-21




Length is a big issue. Ive got bow adjusted to about center shot or just before now and a 500 carbon at 32" is hitting a 4-5in right, flying and impacting nock left compared to fletched ?? Im sure i could get it there cutting it down and i may. The 2016 sounds lime the ticket if i wanted a shorter arrow as it seems almost everyone recommending it is shooting a 28-29in arrow not a 31-32in so didnt know if it would play a role. Also i will be tuning for a fixed crawl that should end up around 1" below nock.

From: kstradhunter
Date: 17-Nov-21




And please no one here think that im taking any of your input or info for granted and just questioning it for the sake of it. I am going to likely just order from singles from las and give them a go. My big issue now is i would like to be in 550-575gr total weight range. A 2016 will be shy of that but also not a deal breaker if it comes down to it. As always thank you all for input and help.

From: Flinger1
Date: 17-Nov-21




Your setup looks nice KS and I’m not sure you’d really gain anything by going to an accutune. Also, you are going to have to play around with heavy point weight and an overspined arrow to get to 550gr, on a carbon arra anyhow. I’ll send you a pm on arrows. For reference my draw length is 26.75”, shoot a 28” 500 spine w/145-150gr tip on 50lbs R3 limbs and 28” 600 spine on 45lbs sanlida blackstone limbs, same weight tips. Both of these spines bareshafted well enough that I wouldn’t hesitate shooting a 25yd and under 3d course with either shaft. PM on the way!

From: Stix
Date: 17-Nov-21




However you adjust that accutune is gonna drive the arrow spine. When you first said 3/16" past center, the spine calculator pointed to a 2117. But after sethe pic, it appears the most you will be is 1/8 past, or even less. You'll be firmly in the 2016/2018 territory. Best wishes. Please report back and let us know what tunes out for you.

From: Riverwolf
Date: 17-Nov-21




All that "adjustability" on your rig has a "wide spectrum" of shafts that you could make work . On paper....1916-2016-2018 all doable . I prefer 2018's for dia./weight/toughness....

If your bow wasn't adjustable for the to center(plunger button ) , all those shafts would still be doable with it anywhere near cut to center in that draw weight/draw length. Like mentioned...form-draw-release-string material -etc...play a role in final tune, but those three choices will all likely be very doable with little effort.

From: kstradhunter
Date: 26-Nov-21

kstradhunter's embedded Photo



Well i decided to build a carbon for this bow for hunting instead of aluminum. Against most peoples best judgement i went with a Traditional Only Barebow 340 @31" with 80gr Ethics Archery Insert/Outsert and a 200gr head and it tuned out well. Thanks all for advice and i will definetely still refer back to this post for aluminum info when needed!





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