The crossbow I'm considering is rated at 385 fps with a 398 grain 20" bolt (200 lb. peak draw weight, 14" power stroke). I called the company and they warrant the xbow for anything 390 gr. and up, so I have been doing a lot of research regarding arrow weight, spine, and foc.
One tool that I found to be really helpful was the "Build your own arrow" online tool by Gold Tip. I have messed around with the different variations and I am stuck between the Laser II Pro and Laser III Pro, as I plan on doing target shooting out to 100 yards; so the shaft weight variation I want to keep to a minimum, but I also want to keep the FOC in the 12-18% range if possible.
I plan on building these myself to make them as consistent as possible and match the spine correctly, however I have a few questions for the experts out here.
- What is the better spine for the bow that I have described above (Eastman (Carbon Express) Covert CX2) - the Laser II or the Laser III? I really like the math results with the Laser II, but I am afraid the spine may be too weak for this bow.
- Does anyone shoot a similar setup and what have their experiences been?
Lastly, I understand that all of this "theory" cannot match real-life shooting, I'm just trying to avoid re-inventing the wheel if possible...
Edited by rchristoff, 07 June 2012 - 10:45 PM.