400 spine out of 80 lb bow ????

[romaknows]

I always thought a stiffer spine was going to be best for a heavy lb bow , but I noticed that Cameron Haines shoots a 400 spine fmj with his 80 lb hoyt.I shoot 340 fmj's out of a 70 lb elite ,but would love to lose some weight by going down to 400's .

[turkeyfeather]

I'm by no means an expert, but that sounds like a light arrow for that.

[hughjorgan]

I always thought a stiffer spine was going to be best for a heavy lb bow , but I noticed that Cameron Haines shoots a 400 spine fmj with his 80 lb hoyt.I shoot 340 fmj's out of a 70 lb elite ,but would love to lose some weight by going down to 400's .

If you are concerned about the weight of the fmj, why not just shoot a carbon like the axis?

[romaknows]

I always thought a stiffer spine was going to be best for a heavy lb bow , but I noticed that Cameron Haines shoots a 400 spine fmj with his 80 lb hoyt.I shoot 340 fmj's out of a 70 lb elite ,but would love to lose some weight by going down to 400's .

If you are concerned about the weight of the fmj, why not just shoot a carbon like the axis?

Ya ,I am going back to carbon's (dont care for the fmj's) I just saw what he is using and have never heard of that before , I was always under the impression that you would get a better tune with a stiffer spine shooting that much weight.

[scotty1969]

watch some videos on shattering carbon arrows before you decide deviate from specs.he probably doesn't shoot his arrows much before they are replaced with new.... i shoot beman 340 on my 80 pound bow because that's what the specs call for and i get close to 312 fps. with them

[turkeyfeather]

That shattering arrow thing is what would make me nervous. That doesn't look like a good time.

[romaknows]

watch some videos on shattering carbon arrows before you decide deviate from specs.he probably doesn't shoot his arrows much before they are replaced with new.... i shoot beman 340 on my 80 pound bow because that's what the specs call for and i get close to 312 fps. with them

They were 400 fmj's so maybe he feels safer ? Can the fmj even shatter ??

[scotty1969]

yes they all can possibly shatter.but what were mainly looking at is the ability to flex properly when shot.look at a arrow size selection chart by one of the big name manufacturers for length weight and cam design to match what you have for safety.

[scotty1969]

you do realize what the 340 and 400 and 500 meen right? and please im not being a smart alek

[JLS]

There are much better ways to lighten your arrow than to use a spine that is too weak.  Find a shaft that is fewer grains per inch.

[deerslyr]

If I remember correctly he shoots a fairly short draw....but im not sure if its short enough for 400s out of an 80 lber?? I did see on facebook tonight that he shot a pretty good 160 yard group  So its obviously not affecting his accuracy

[scotty1969]

weight is kinetic energy witch is kill capability you lose some speed when using heavier arrows but your bow will have a longer life etc etc etc it goes on depends on what you want heavier is safer.anything over 65 pounds in my opinion needs to be 340 but that is just my opinion.and your bow will have an ibo recomendation for safety

[romaknows]

you do realize what the 340 and 400 and 500 meen right? and please im not being a smart alek

Yes i know what all this means which is why I thought it was odd that someone shooting 80 lbs would use a 400 SPINE shaft and not a 340 or even what most would recommend , a 300 SPINE.Please read OP.

[bucklucky]

For cameron , looks like he is on the border of using a 400 spine or 340 with his draw length .

[str8meat]

bad idea using that light off spine for the heavy pullers. my bowtech goes 83lbs. i have to shoot easton axis 300's or goldtips 100 + neither of which have stopped on impact of an animal. be carefull using the light ones might be a splintered limb in the future.

[sirfunkeybut]

Seems to light to me as well, I shoot 340's at 70 with a 100 grain and my arrows are 25 1/4 in. Still probably to light but, I still don't quite understand it all though 

[Annette]

Seems crazy light to me....I shoot 452 grains at 50 lbs...

[deerslyr]

To determine your proper spine it is a combination of both draw length and draw weight, not just weight. Also, the spine of your arrow really doesnt determine the weight of it, although an arrow with a heavier spine typically has a heavier GPI. You can have an arrow with a spine of 400 weigh 500 grains and an arrow with a 340 spine weigh 400 grains. If the OP wants a lighter arrow weight go to a lighter broad head, no wrap etc
I know cams arrows are fairly heavy, he killed a griz with his set up this spring so its definitely plenty for any species in N/A

sirfunkeybut, your overspined, but its not really a big deal. Id rather be overspined than underspined.

[scotty1969]

im sorry i did read op and you are making a statement and what seemed to me a question at the same time if im wrong im wrong but thats how i see the op

[earlmarne]

i always go stiff on spine for my hunting arrows so i can build up FOC without making my arrow too weak.i never understood how he is shooting such a weak spined arrow.must be short draw,along with light tip and well tuned bow

[Jellymon]

He shoots a short arrow, which stiffens up your spine. A 400 spine arrow Is only 400 at I believe 29", any shorter and the arrow stiffens up.
These arent exact numbers but say you cut a 400 spine arrow to 25", it now will be as stiff as a 300 spine arrow at 28".
Take a piece of steel the size of a pencil and try to bend it, you cant, very stiff. Now take that same piece of steel at 3 feet and its much easier to bend. Same idea.
This is why he shoots a 400 out of an 80 lb bow. Plus, he doesnt seem to be having any problems to me.

[deerslyr]

 

[owmygulay]

He shoots a short arrow, which stiffens up your spine. A 400 spine arrow Is only 400 at I believe 29", any shorter and the arrow stiffens up.
These arent exact numbers but say you cut a 400 spine arrow to 25", it now will be as stiff as a 300 spine arrow at 28".
Take a piece of steel the size of a pencil and try to bend it, you cant, very stiff. Now take that same piece of steel at 3 feet and its much easier to bend. Same idea.
This is why he shoots a 400 out of an 80 lb bow. Plus, he doesnt seem to be having any problems to me.

Exactly what he said. He has a really short draw and uses a short arrow and a light point.

[coachcw]

I would still say he is pretty light on the spine , he may use a light point/ broadhead that would help . seems to me like it would be hard on limbs . with todays arrows and fmj's I dont think i'd be concerened with breaking an arrow .

[Whitetail freak]

His shorter draw allows his arrows to be cut short for a stiffer spine.

[hogslayer]

I thought the same thing.  But if you look online at there charts he isn't too far off.  His arrows are 26.5 inches.  Or so he claims on his website.