Arrow spine for a 65 lb compound at a 28 inch arrow with a 100 grain point: a 340 spine (band 340-400), plus the 325 grain minimum weight. Sourced.
Updated 05 September 2026.
What arrow spine for 65 lb draw at a 28 inch arrow
The starting spine for a 65 lb draw at a 28 inch arrow with a 100 grain point, and the weight floor.
| Draw weight | 65 lb |
|---|---|
| Arrow length | 28 in (cut, nock groove to shaft end) |
| Point weight | 100 gr |
| Recommended spine | 340 (published band 340-400) |
| Minimum total weight | 325 gr, from the 5-grains-per-pound floor |
Easton 5mm Axis carbon arrow shaft (340 spine)
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A 65 lb draw at a 28 inch arrow with a 100 grain point sits in the 340 to 400 band and lands on 340 at this common whitetail draw weight. A 125 grain point would move it toward 300.
Spine is a starting point, not a guarantee, because a 340 from one brand can differ from another. Confirm on your arrow maker's chart at 28 inches and 65 pounds, or bare-shaft test before cutting a dozen.
Whatever spine you land on, keep the finished arrow at or above 325 grains total, the 5-grains-per-pound floor, so the bow is not shooting dangerously light.
The rules behind this pick
Questions and answers
What arrow spine for 65 lb draw at a 28 inch arrow?
For a 65 lb draw at a 28 inch arrow with a 100 grain point, start with a 340 spine (the 340-400 band), and keep the finished arrow at or above 325 grains total.