Spine 300 Easton 5MM FMJ vs Spine 400 Easton 5MM FMJ: specs compared
Updated 05 September 2026.
12 GPI
Spine 300 Easton 5MM FMJ wins on grains per inch
On grains per inch, Spine 300 Easton 5MM FMJ leads: 12 GPI versus 10.2 GPI.
| Spec | Spine 300 Easton 5MM FMJ | Spine 400 Easton 5MM FMJ |
|---|---|---|
| Model | Easton 5mm FMJ | Easton 5mm FMJ |
| Brand | Easton | Easton |
| Spine | 300 | 400 |
| Outside diameter | .273 in OD | .263 in OD |
| Weight | 12 GPI | 10.2 GPI |
| Grains per inch | 12 GPI | 10.2 GPI |
| Inside diameter | .204 in | .204 in |
| Stock nock | 5mm X nock (9 gr) | 5mm X nock (9 gr) |
| Stock insert | 5mm HIT insert (16 gr) | 5mm HIT insert (16 gr) |
| Point thread | 8-32 | 8-32 |
| Straightness | +/-.001 in | +/-.001 in |
| Suits | a heavy draw of roughly 65 lb and up | a medium draw of roughly 45 to 65 lb |
Questions and answers
Which has the higher grains per inch, Spine 300 Easton 5MM FMJ or Spine 400 Easton 5MM FMJ?
On grains per inch, Spine 300 Easton 5MM FMJ leads: 12 GPI versus 10.2 GPI.
How do Spine 300 Easton 5MM FMJ and Spine 400 Easton 5MM FMJ compare?
On grains per inch, Spine 300 Easton 5MM FMJ leads: 12 GPI versus 10.2 GPI.