What arrow spine for 55 lb draw at a 28 inch arrow
The starting spine for a 55 lb draw at a 28 inch arrow with a 100 grain point, and the weight floor.
Dry-fire warning
Crossbow bolt data and archery arrow spine, nock and thread data are quoted from each manufacturer's published figures, owner documentation and industry standards, cited on every page. A nock, spine or grain-weight mismatch can cause a dry-fire that damages the bow and can injure the shooter. Confirm against your own owner's manual and the arrow maker's own chart before shooting, and never drop below the stated minimum total weight.
| Draw weight | 55 lb |
|---|---|
| Arrow length | 28 in (cut, nock groove to shaft end) |
| Point weight | 100 gr |
| Recommended spine | 400 (published band 340-400) |
| Minimum total weight | 275 gr, from the 5-grains-per-pound floor |
Easton 5mm Axis carbon arrow shaft (400 spine)
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A 55 lb draw at a 28 inch arrow sits in the middle of the 340 to 400 band and lands on 400 with a standard 100 grain point. It is a common women's and youth-adult hunting spine.
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 55 pounds, or bare-shaft test before cutting a dozen.
Whatever spine you land on, keep the finished arrow at or above 275 grains total, the 5-grains-per-pound floor, so the bow is not shooting dangerously light.
The rules behind this pick
Sources: Nock On Archery - Arrow Spine Chart: choosing the correct spine · Sportsman's Warehouse - Arrow Spine Charts: Compound, Recurve and Traditional