I bought some steelforce single bevels this year to use but haven't got to use them I shot my compound and it acts like my spine is too stiff. I got the 225 grain and using the carbon express piledriver out of a 60lb pse omen. What spine are you guys using it's hard to find information on these heavy head heavy arrow combinations. What about inserts any tricks without buying some? I want to try and get more weight up front to see if it's is too stiff of a spine I'm also using 32in arrows. I think a place called red feather archery sells a single bevel too.
You did not state what spine arrow you are shooting. This is what I found. The 450 arrow has the stiffest spine, .300.
- Nock Collar – Carbon Express proprietary BullDog™ Nock Collar comes standard on all PileDriver arrows and shafts to protect the shaft against nock-end impacts.
Nock Collars weigh 4 grains.
- Sizes: 250 (10.4gpi & .400 spine), 350 (11.3gpi & .350 spine), 450 (13.1gpi & .300 spine)
Source of chart:
http://www.huntersfriend.com/carbon-arrow-spine-charts-sizing-deflection-research.html
From the above link, using “only” a 125 grain head, 60# and a 32” arrow, you need the stiffest spine shaft that Carbon Express makes. Shooting a 225 grain head out of your setup, I can not believe that your arrows are too stiff, and that is if you are even shooting the stiffest spine available.
I have done a lot of testing shooting using internal weights. This is important, adding weight to the front weakens the dynamic spine, adding weight to the nock end of the arrow stiffens the dynamic spine. Adding weight to the back lowers your front of center, the exact opposite of what you are trying to accomplish, if I read that right.
In my experience, adding weight to the back end made that arrow more “unstable” by reducing front of center. I have used a threaded rod and weights inside of the arrow. I do not fly any arrows weighted in the rear. So I would not use the collars.
I have shot many combinations ranging from 800 to 1005 grains with a 125 grain tip or head out of 70# longbows. Adding the weights inside “shortened” the actual working length of the arrow, because the weights fit flush and snug, raising the dynamic spine of these arrows. The front inches of the arrow can not flex. So in reality, the working part of the arrow is shortened and entire weight system and tip of head is really the head.
All of this testing began with bare shaft tuning.
Even 3 Rivers Archery, a traditonal site, only goes to 200 grains.
The only other way for you to stiffen your dynamic spine would be to shorten your arrow. I do not know your draw length and how much arrow you have to play with.
So this spring, I will begin some new testing with, heavier heads and see what happens.