⌖ Ballistic Wire

Fresh Ammo,
Real Numbers

When a new load drops, we run it through the penetration engine — and report what it actually does in gel, denim, and barriers. Cited specs, no marketing.

UPDATED WEEKLY · PHYSICS-BASED
✦ New Load 01 AUG 2026

Federal Punch .45 ACP — a Defensive Load That Doesn't Overthink It

230 gr JHP · 890 fps (271 m/s) · 404 ft·lb ME

Federal's Punch line aims at exactly one thing: reliable expansion and FBI-spec penetration at a working-man's price. We ran the .45 ACP 230gr variant through the engine against the standard barrier set. Here's where it lands — all figures are our model, computed from Federal's published velocity.

BarrierPenetrationVerdict
Bare 10% gel14.8"FBI spec (12–18")
4-layer denim14.2"holds
Drywall (2 walls)~6 walls totalover-penetrates indoors

The .45 Punch behaves like a textbook heavy JHP: slow, deep, and stable. It sits comfortably in the FBI window in bare gel and holds through heavy clothing. The tradeoff is the usual one for a big-bore defensive round indoors — enough momentum to keep going through interior walls, so backstop awareness matters.

⌖ The Physics
"At 271 m/s, the .45 Punch is slow enough that expansion is doing the work, not velocity. The heavy 230gr bullet carries momentum well past the gel window if it meets only drywall — which is why 'deep in gel' and 'over-penetrates walls' are the same coin."
Run this load yourself →
Spec source: Federal Premium published data (Punch .45 ACP 230gr). Penetration figures computed by BallisticEngine — model estimate, not a lab measurement.
· · ·
⚠ Myth Check 25 JUL 2026

"Green Tip Is Armor-Piercing" — What 5.56 M855 Actually Does

62 gr steel-core · 3,020 fps (920 m/s) · SS109 / M855

Every ammo shortage brings the same claim: M855 "green tip" is armor-piercing. It isn't — not by the legal definition, and not against real hard armor. But it also isn't just ball. Here's the honest middle.

M855 has a steel penetrator tip over a lead core. Against mild steel and thin barriers, that tip helps — it punches through car doors and light plate better than a soft-point. Against a proper Level III AR500 plate, our model and field data agree: a single plate rated for 7.62 M80 ball generally stops M855 as well. The steel tip isn't tungsten; it doesn't defeat hardened armor.

Where it earns caution is Level IIIA soft armor — any 5.56 rifle round, green tip or not, defeats soft armor easily. That's a rifle-vs-soft-armor fact, not something special about the steel core.

⌖ The Physics
"The steel tip changes the failure mode against thin ductile targets — less deformation, more punch. Against hard ceramic or AR500 sized for M80, the whole projectile still loses. 'AP' is a legal category M855 doesn't meet."
Test M855 vs armor →
Classification per US 18 USC §921(a)(17) (armor-piercing definition). Penetration behavior computed by BallisticEngine — model estimate.
· · ·
◈ Comparison 18 JUL 2026

Same Weight, 34% More Stopping Power — Why UHMWPE Beat Kevlar

Dyneema SB117 UD vs Kevlar KM2 · 0.80 lb/ft² · 9mm FMJ

A single patent test (US 10,788,293) put woven Kevlar and laminated Dyneema head to head at the same panel weight against 9mm. The gap is bigger than most people expect — and the reason is the fiber's form, not the fiber itself.

PanelV50 (9mm)
Dyneema SB117 (UD laminate)1997 ft/s+34%
Kevlar KM2 Plus (woven)1486 ft/sbaseline
Dyneema (woven)469 ft/s−68%

The kicker is that bottom row: the same Dyneema fiber, woven instead of laminated, collapses to a quarter of its performance. UHMWPE is too slippery to hold a weave — it needs a resin matrix. Form beats fiber.

⌖ The Physics
"Lower density means more fiber per unit weight, so UD Dyneema out-stops Kevlar at matched areal density. But weave it and slippery fibers pull through the crossings — the same reason real UHMWPE armor is always a laminate."
Read the full breakdown →
Source: US Patent 10,788,293 "Flexible body armor" (comparative V50 examples, verbatim). Full analysis on the blog.

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