What bullet diameter is .25-45 Sharps?

.25-45 Sharps uses a 0.257″ (6.528 mm) diameter bullet.

What is .25-45 Sharps used for?

.25-45 Sharps is primarily used for hunting, target.

What is .25-45 Sharps based on?

.25-45 Sharps is derived from the .223 Remington case.

Lindcott Armory

Centerfire Rifle · SAAMI

.25-45 Sharps

Also known as .25-45

A modern AR-15 hunting cartridge introduced by Sharps Rifle Company in 2012 by necking the .223 Remington case up to .257 caliber.

Caliber: 0.257″ · 6.528 mm
Introduced: 2012
Case: Bottleneck
Parent: .223 Remington
Primary use: Hunting, Target
Status: Active

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Velocity2,790–3,300 fps

Energy1,503–2,103 ft·lb · est.

Identity

Introduced: 2012
Type: Centerfire Rifle
Origin: United States
Inventor: Sharps Rifle Company
Standard: SAAMI
Status: Active

Pressure & range

Max pressure: 55,000 psi
Eff. range: 250 yd

Ballistics

Representative trajectory · velocity only, no drag model · 100 yd zero0–1000 yd

Drop Zero

Velocity only, no drag model: no published ballistic coefficient is on file for .25-45 Sharps, so this is the shape gravity alone gives the advertised velocity. Drag would steepen it. The tool below solves real loads through their published G1 or G7 model.

Open in Ballistic Compare

Parent case: .223 Remington

Representative trajectory — modeled from a single velocity input (no published BC for this cartridge yet).

Dimensionscase measurements · scale drawing · size vs familiar rounds

Case dimensions — the scale drawing at the top of the page is built from these.

reloading data · approximate

Measure	mm	in	✓
Bullet ⌀	6.53	0.257	✓
Neck ⌀	7.21	0.284	✓
Shoulder ⌀	8.97	0.353	~
Shoulder angle	23°	—	✓
Base ⌀	9.55	0.376	✓
Rim ⌀	9.60	0.378	✓
Belt ⌀	n/a
Rim thickness	1.14	0.045	✓
Neck length	6.12	0.241	≈
Case length	44.70	1.760	✓
Overall length	57.40	2.260	✓

Size vs familiar rounds

Drawn at true 1:1 — every case is accurate relative to the others. Absolute size depends on your screen's pixel density, so measuring one against a real ruler may be off. .25-45 Sharps is highlighted below.

Reloading costestimate cost per round vs factory

Estimate your cost per round and how it compares to factory. Inputs are yours — nothing is stored.

Powder $/lb Charge (gr) Bullet $/ea Primer $/ea Brass reuses Brass $/ea

Cost estimate only — not load data. Charge weight is your input; follow published manuals for safe charges.

Lineage

Family TreeOpen .25-45 Sharps in the interactive cartridge family tree

Connected reference

FirearmsFirearms in .25-45 Sharps ToolCompare ballistics

History

A modern AR-15 hunting cartridge introduced by Sharps Rifle Company in 2012 by necking the .223 Remington case up to .257 caliber. Designed specifically to give AR-15 hunters a legal option in the growing number of states that impose minimum caliber restrictions on deer hunting with semiautomatic rifles. SAAMI-standardized in 2015. Functions in any standard AR-15 lower receiver with only a barrel change — the bolt, magazine, and gas system are unmodified.

FAQs

What bullet diameter is .25-45 Sharps?: .25-45 Sharps uses a 0.257″ (6.528 mm) diameter bullet.
Is .25-45 Sharps still in production?: .25-45 Sharps is active.
What is .25-45 Sharps used for?: .25-45 Sharps is primarily used for hunting, target.
What is .25-45 Sharps based on?: .25-45 Sharps is derived from the .223 Remington case.

Sources & provenance

Manufacturer Sierra Bullets — Sierra Load Data — 25x45 Sharps · bullet ⌀, velocity, grain weights archived
Secondary American Rifleman (NRA) — The .25-45 Sharps: A New 'Old' Cartridge · year, grain weights, velocity archived

Data & sources. Specs compiled from the Lindcott Armory reference; the trajectory is modeled (point-mass), not measured. See methodology. Spotted an error? Report it →