BoltFitFinder

Spine 300 Easton 5MM Axis vs Spine 340 Easton 5MM Axis: specs compared

Updated 05 September 2026.

10.7 GPI
Spine 300 Easton 5MM Axis wins on grains per inch

On grains per inch, Spine 300 Easton 5MM Axis leads: 10.7 GPI versus 9.5 GPI.

SpecSpine 300 Easton 5MM AxisSpine 340 Easton 5MM Axis
ModelEaston 5mm AxisEaston 5mm Axis
BrandEastonEaston
Spine300340
Weight10.7 GPI9.5 GPI
Grains per inch10.7 GPI9.5 GPI
Inside diameter.204 in.204 in
Stock nockEaston X nock (9 gr)Easton X nock (9 gr)
Stock insertEaston ST Axis HIT insert (16 gr)Easton ST Axis HIT insert (16 gr)
Point thread8-328-32
Straightness+/-.003 in+/-.003 in
Suitsa heavy draw of roughly 65 lb and upa medium draw of roughly 45 to 65 lb

Questions and answers

Which has the higher grains per inch, Spine 300 Easton 5MM Axis or Spine 340 Easton 5MM Axis?

On grains per inch, Spine 300 Easton 5MM Axis leads: 10.7 GPI versus 9.5 GPI.

How do Spine 300 Easton 5MM Axis and Spine 340 Easton 5MM Axis compare?

On grains per inch, Spine 300 Easton 5MM Axis leads: 10.7 GPI versus 9.5 GPI.

Compared here

Easton 5mm Axis in a 300 spine: GPI, bore and nockEaston 5mm Axis in a 340 spine: GPI, bore and nock