Spine Help

[CB4]

Shooting a 70lb V3. 28.5" draw. Arrows can be cut down to 27". Looking to run 200 grains up front total. 300 or 250 spine? Looking at BE Rampages.

 

[Samdemarais]

Should be good with 300. Buy 3 300 and 3 250, use hot melt to glue in and test which one tunes best if you really want to know.

 

[Billy Goat]

I'd lean towards the 250's. I can't remember, might be a fair amount of weight difference from 300-250's in the rampage.

I ran 250's from my vxr at 28.5" but @75#. Had 125 heads and 60 grain insert with a 28" arrow. I'm sure you could make 300's work, but the only disadvantage I see to the 250's is the weight, and depending on what your doing with it that might not be a disadvantage. Keep in mind that some of the insert systems end up taking up a fair amount of shaft, that can help you run a lighter spine.

 

[CB4]

I'd lean towards the 250's. I can't remember, might be a fair amount of weight difference from 300-250's in the rampage.

I ran 250's from my vxr at 28.5" but @75#. Had 125 heads and 60 grain insert with a 28" arrow. I'm sure you could make 300's work, but the only disadvantage I see to the 250's is the weight, and depending on what your doing with it that might not be a disadvantage. Keep in mind that some of the insert systems end up taking up a fair amount of shaft, that can help you run a lighter spine.

The weight difference is a factor. Ideally I wanted to be around 475-485 total grains and that will be impossible with 250s. But not the end of the world. I am going to be running Iron Will inserts and collars.

 

[Blktailhtr]

I shoot the same setup as you on my VXR and run 300's at 27.5 with 200 up front with perfect arrow flight. Thats with 4 fletch Q21 2.1 and nocturnals, Just over 500 grains and 15 foc

 

[Billy Goat]

The weight difference is a factor. Ideally I wanted to be around 475-485 total grains and that will be impossible with 250s. But not the end of the world. I am going to be running Iron Will inserts and collars.

You might be better of getting a heavier insert (longer) and ditching the collars. You want to have some space between the collar and your rest. I don't know what the lengths are of the IW hits are, might not be enough difference in them to matter. Just like I was saying earlier, a longer insert takes up more shaft space, effectively giving you a shorter shaft, helping you run a lighter spine.

 

[Brendan]

I think you should be fine with 300's. I am a 29.25" draw, run 27.5" carbon to carbon arrows with 175 grains up front out of a 73# bow.

With that said, I want to say my rampages are 490 ish with that 175 up front. I'd need to check.

 

[TCUHunter34]

You’ll be fine with either. I have a very similar set up, 250 spine with 200 up front. I have very good flight. Seems others have similar experience with the 300’s