Check their website. Check Lancasters to see if they have specs on them as well. I would look for the right spine of arrows there.

 

Lancaster doesn't carry them and Sportsman's website doesn't list any details beyond spine and straightness :mg:

 

The manufacturers website.

If you can't find the GPI then weigh the raw shaft at the store and figure it out.

 

The manufacturers website.

If you can find the manufacturer's website, you're a better man than I! I believe they're a private label GT, but not sure what variant.

 

The Vital impact arrows from Sportsmans have the GPI on the arrows. I just looked at a box I had and this is what it list.
600=5.9
500=6.3
400=7.4
340=8.2
300=8.8

 

Thank you! I looked at the box while I was there, but didn't remember seeing it even on the box. Couldn't get to the arrows themselves.

 

Are those relabeled GT Vapor shafts?

 

Thanks for the insite fellas. I bought a pack of 600's last night. weights were listed on the back of the box big as life! :embara::set1_rolf2: I just plain missed them!