70-80 lb bows

[nguerrero5]

Hello all. I’m venturing into a 70-80 lb bow and just curious as to what you guys are running arrow wise. Spine, total weight and what kind of speeds you guys are getting. Thank you can’t wait to hear what you guys have!

 

[Mighty Mouse]

Spine charts/calculators will likely recommend 250-300 depending on how long your arrow is and how much weight you put on the front. ABF has a good calculator on their website that will estimate speed based on draw weight, draw length, arrow weight, and your bow's speed (IBO) rating:
https://www.ashbybowhunting.org/arrow-speed-calculator

Edited to add: ABF's speed calculator is one of the few that properly accounts for the relationship between arrow weight and energy (energy increases slightly as weight increases). Many arrow speed calculators erroneously apply a fixed fps per grain assumption, which underestimates speed at heavier weights. The underestimation is often insignificant at moderate arrow weights but can become substantial if used to estimate the speed of very heavy arrows.

 

[Maxhunter]

Yep you’ll most likely have to use a 250-300 spine arrow. I like using the backcountry calculator I find it’s spot on. Remember check with a chronograph first because what the bow manufacturer list isn’t the real speed.

ArcheryCalc – Backcountry Bowhunting

backcountrybowhunting.com

 

[150plusB&C]

I’m on my 2nd 80lb’r. Both bows ended up liking the same set up. Axis 260, 75 gr brass insert, 125 gr heads, collars, total weight 570 gr. It shot 250-268 fps depending on draw weight.

I will say I have ZERO issues with pass throughs. I’ve broken both legs/shoulders on several deer and so far pass throughs on 2 elk. The way the animals react following the shot with a heavy arrow versus super fast light set ups in the past is what sold me on it. My experience anyway.


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[180ls1]

250 spine. I am on the edge of weak with my 31" draw. 510 TAW

 

[5MilesBack]

I used to shoot my PSE Freak at 75lbs and draw measured 32 7/8" on a draw board. I shot GT Kinetic XT 200's, 520gr total arrow weight at 296fps. They shot well. I won a couple 3D shoots with that setup. But those limbs just couldn't take it. I replaced limbs five times due to splintering until they told me they didn't have anymore limbs, and wouldn't get anymore. That bow still has the last set of limbs on it and one limb has two splinters. I have it set at 67lbs now. Still shoots well, but I have a newer bow that is my primary. I shot a few elk, a moose, and a BH ram with it.

 

[nguerrero5]

I used to shoot my PSE Freak at 75lbs and draw measured 32 7/8" on a draw board. I shot GT Kinetic XT 200's, 520gr total arrow weight at 296fps. They shot well. I won a couple 3D shoots with that setup. But those limbs just couldn't take it. I replaced limbs five times due to splintering until they told me they didn't have anymore limbs, and wouldn't get anymore. That bow still has the last set of limbs on it and one limb has two splinters. I have it set at 67lbs now. Still shoots well, but I have a newer bow that is my primary. I shot a few elk, a moose, and a BH ram with it.

what were the limbs rated for?

 

[nguerrero5]

BTW I have a DL of 29.5.

 

[Okie-hunter]

I shoot a Hoyt VTM 31 70# 27.5”
350spine Victory Rip TKO w/ 50 gr outsert
100gr QAD Exodus
283fps total arrow weight 410gr

 

[nguerrero5]

I shoot a Hoyt VTM 31 70# 27.5”
350spine Victory Rip TKO w/ 50 gr outsert
100gr QAD Exodus
283fps total arrow weight 410gr

my current set up is a 70# hoyt ventum 30 300 victory rip tko 72 gr stainless steel insert and 125 up front. shooting 267fps

 

[Okie-hunter]

my current set up is a 70# hoyt ventum 30 300 victory rip tko 72 gr stainless steel insert and 125 up front. shooting 267fps

Sorry, I slightly misunderstood your statement I thought you were looking in to 70 or 80# bows. Not an 80# bow you could back off to 70.

 

[nguerrero5]

Sorry, I slightly misunderstood your statement I thought you were looking in to 70 or 80# bows. Not an 80# bow you could back off to 70.

I ordered a nock 30 in 70-80#’s so I’m looking for arrow weights and speeds just to brainstorm. I’m unsure what I’m going to run. But my current set up is the ventum. Haven’t set up or received the Pse yet

 

[Duh]

80 lb Hoyt VTM 34, 29.5 inch draw, 260 axis that weighs 538grains. Shooting 293 fps.

 

[roadrunner]

Whatever the arrow manufacturer recommends based on draw weight and length.

It will likely be sub 300 spine for anything above 72-73 lb draw wt.

 

[Ho5tile1]

2 of my bows are 81 pounds29 inch draw 550 grain arrow 250 spine 28 inches long tunes great and on my chrono they both fling it 283-285 fps one bow is the Mathews VXR 28 and the V3X 29 both with 75 pound mods with the cables made a little short to get me that poundage.


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[S.Clancy]

One of mine is a Hoyt Factor 30, 500 gr arrow, mid 280's fps. The other, Elite Impulse 34, same arrow, slightly slower.

 

[paxamus]

I’ve been shooting 80lb bows for years. My favorite arrows have been the Sirius Apollo and Gemini both in 250 spine (I have a 28.5 draw length). With the Apollos- they are very sturdy but have a slightly better gpi than the Axis. Now I’m shooting the Gemini in 250 (8.68 gpi)- I have a 75 g IW insert, 10 g collar and 125 g head. So there’s like 210 grains up front and they fly great! These have been, by far, my favorite arrows!
My total arrow weight is 482g and they are going 296 fps


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[nguerrero5]

I’ve been shooting 80lb bows for years. My favorite arrows have been the Sirius Apollo and Gemini both in 250 spine (I have a 28.5 draw length). With the Apollos- they are very sturdy but have a slightly better gpi than the Axis. Now I’m shooting the Gemini in 250 (8.68 gpi)- I have a 75 g IW insert, 10 g collar and 125 g head. So there’s like 210 grains up front and they fly great! These have been, by far, my favorite arrows!
My total arrow weight is 482g and they are going 296 fps


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Do you run into any tuning issues at that speed?

 

[paxamus]

Do you run into any tuning issues at that speed?

Honestly, no. The bow was tuned well because I just had new strings put on. I switched to a three fletch left helical and my broadheads and field points hit the same out to 60. Haven’t shot broadheads past 60 yet


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[KBC]

I have a 70lb axius ultra that’s about 73.5-74lbs.
Axis 300 spine a little over 29”. 50g insert, 125g heads and 10g iron will collars. 4 fletch heat vanes.
Total arrow weight is 535 or 539 I can’t remember which one.
30” DL shoots 270 fps
My buddy shot these arrows in the new Mathew’s bow at 75lbs and a 28.5 DL and was getting about 260fps