Rifle · Proprietary

.499 LWR

.499 Leitner-Wise Rifle

A straight-walled .50-caliber-class big-bore designed by the Leitner-Wise Rifle Company to give the AR-15 real knock-down power the 5.56 NATO lacks.

Identity
Introduced
2000
Type
Rifle
Origin
United States
Inventor
Leitner-Wise Rifle Company
Manufacturer
Leitner-Wise Rifle Company
Standard
Proprietary
Status
Obsolete
Availability
Scarce
Dimensions
Bullet ⌀
0.499″
Case length
1.6″
Overall length
2.26″
Base ⌀
0.542″
Twist
1:18
Primer
Large Rifle
Case type
Rebated Rimless
Performance
Max pressure
35,000 psi
Eff. range
200 yd
Max range
1000 yd
Recoil
20–30 ft·lb

Ballistics

Representative trajectory · 100 yd zero0–500 yd
100 yd · zero0″−72″72″ drop @ 500 yd0250500Open in Ballistic Compare ↗
Velocity
1,600–2,200 fps
Energy
2,600–3,400 ft·lb
Parent case

Representative trajectory — modeled from a single velocity input, not a measured load.

Dimensions

.499 LWR cartridge dimensions diagram

Reloading cost

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

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

Connected reference

History

Conceived in 1994 and shown at the 2000 SHOT Show, the .499 LWR drew a U.S. Coast Guard development contract that was cancelled in early 2004. It predated and paralleled the .458 SOCOM and .50 Beowulf but never reached production volume; today it survives mainly as collector ammunition and limited brass runs.

FAQs

What twist rate does .499 LWR use?
.499 LWR typically uses a 1:18 twist rate.
What bullet diameter is .499 LWR?
.499 LWR uses a 0.499″ (12.675 mm) diameter bullet.
Is .499 LWR still in production?
.499 LWR is obsolete; typical availability is scarce.
What is .499 LWR used for?
.499 LWR is primarily used for hunting.

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