Victorys Spine Calculator

[Neukdae]

Im looking to get some arrows for my new huntersniche predator coming in, victory has a spine calculator where you enter the different arrow values but they have some confusing entires. First off they have the bow type, for recurves there are olympic recurve, modern recurve, and abs recurve, im not sure what the differences between any of these are. Secondly there is a field called IBO speed, i am aware of how IBO speed applies to compounds but have never heard that term apply with recurves. Anyone have an success navigating victorys spine calculator?

[Tedd]

Use Three Rivers calculator.

[Neukdae]

Use Three Rivers calculator.

Thanks for the info. When they say the dynamic spine should be close it should be within 2#, is that 02.0 20. or 0.2? Also is the arrow length the shaft length or what?