Mechanical (Expandable) Broadheads

The mechanical broadhead makes a straightforward deal: blades tucked aerodynamically in flight (so it flies nearly identical to your practice points, wind be damned), deploying on impact to cut channels up to 2+ inches wide. Blood trails from big mechanicals are famously short. The fine print matters though - deployment costs kinetic energy, extreme quartering angles and heavy bone are its hard mode, and low-poundage setups may not have the energy budget to spend.

What it is

A head whose blades pivot open on impact - rear-deploying designs dominate - held closed in flight by collars, bands or clips. Cut diameters from 1.5 to over 2 inches.

How it works

The compact in-flight profile minimizes steering and wind drift; on contact, blades cam rearward and open, converting a field-point-like arrow into a wide cutting head through the hide.

Strengths

Practice-point flight from hard-tuned OR imperfectly-tuned bows, forgiving in wind at range, and wound channels that produce the shortest, most readable blood trails in archery.

Trade-offs

Deployment eats energy (penetration suffers on the margins), rubber bands and collars are consumables with failure modes, steep quartering shots can deflect or open early, and light setups (youth, low-poundage, short draws) may lack the energy the wide cut spends. Many experienced hands run mechanicals ONLY above a personal energy threshold.

Tuning & practice

Most ship with practice heads matching flight - verify anyway at your real distances. Replace bands/collars per the maker's schedule, check blade retention before every hunt, and confirm your setup's energy fits the head's appetite (heavier arrows help).

Mistakes with these heads

Pairing a 2-inch head with a low-energy setup, never replacing retention bands (blades rattling open in the quiver), taking the steep quartering-away shot the design least loves, and skipping verification because 'they fly like field points' - trust, then verify.