Bodkin Arrow: Point Design, History & Penetration

A bodkin arrow is an arrow fitted with a bodkin point — a squared, spike-shaped arrowhead engineered to pierce armor and heavy material. The name comes from the Old English word for a small dagger and was applied specifically to the head of the arrow, not the shaft. Bodkin points are classified under the Jessop typology, a widely accepted academic system organizing medieval arrowheads into 28 types across military, hunting, and multi-purpose categories.

Shape, Size, and Subtypes

The classic bodkin point arrow features a short, triangular head with a sharp tip and a square cross-section. That geometry concentrates force over a small surface area, improving penetration against resistant materials. Typical bodkin points measured up to 11.5 cm (4.5 in) long and around 1 cm (0.39 in) at their widest. Two principal subtypes existed:

• Needle bodkin — longer and thinner, designed to break chain mail rings, though the slender tip was prone to bending against plate armor at higher impact angles.
• Plate cutter — shorter and more robust, developed specifically to defeat plate armor, often combined with case-hardening for improved performance.

Metallurgy and Case-Hardening

Bodkin arrowheads were made from iron or steel. High-performance tips were produced through case-hardening: wrought iron was packed in charcoal dust, sealed, and baked at red heat so carbon leached into the surface, converting the outer layer to steel. The hardened tip resisted deformation on impact while the softer body prevented brittleness. Research by the Royal Armouries notes that many medieval arrowheads were wrought iron rather than hardened steel, suggesting the bodkin tip arrow was not always the primary armor-piercing tool — compact broadhead forms were also widely used.

Penetration Performance

In Saxton T. Pope's 1923 ballistic tests, a heavy bodkin arrowhead fired from a 75-pound bow at 10 yards entered a 1/16-inch brass plate to a depth of 1½ inches and split a tempered steel saw blade 1/32-inch thick. Modern controlled tests have confirmed that a bodkin point can penetrate gambeson and mail from a longbow of similar draw weight, though plate armor of meaningful thickness reliably stopped most shots.

Traditional Archery and Reenactment Today

The bodkin arrow is rarely used in mainstream archery today, but remains valued by traditional archers, collectors, and medieval reenactors. Understanding historic point selection — including when to choose a bodkin over a broadhead — reflects the same depth of gear knowledge that serious archers carry into any discipline. For those exploring the traditional side of the sport, reviewing how to prepare for a successful bowhunting trip or studying traits that set competitive archery champions apart offers useful context on how equipment knowledge translates to performance.