Rifle · Obsolete

.22 Remington Automatic

.22 Rem Auto

Proprietary rimfire cartridge developed by Remington specifically for their Model 16 semi-automatic rifle.

Caliber
0.223″ · 5.664 mm
Introduced
1914
Case
Rimfire
Primary use
Small Game, Target
Status
Discontinued
Velocity950–1,000 fps
Energy90–100 ft·lb
Typical grains45 gr
Identity
Introduced
1914
Type
Rifle
Origin
United States
Inventor
Remington
Manufacturer
Remington
Standard
Obsolete
Status
Discontinued
Availability
Collector
Build
Case capacity
8.5 gr H₂O
Twist (typical)
1:16
Primer
Rimfire
Case type
Rimfire
Pressure & range
Max pressure
23,000 psi
Eff. range
50 yd
Max range
150 yd
Recoil
0.2–0.4 ft·lb
Subsonic
Capable

Ballistics

Representative trajectory · 25 yd zero0–200 yd
25 yd · zero0″−61″61″ drop @ 200 yd0100200Open in Ballistic Compare ↗
Parent case

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.

SAAMI · approximate
Measuremmin
Bullet ⌀5.660.223·
Neck ⌀6.220.245·
Shoulder ⌀n/a
Shoulder anglen/a
Base ⌀6.220.245·
Rim ⌀7.370.290·
Belt ⌀n/a
Rim thickness
Neck lengthn/a
Case length16.840.663~
Overall length23.370.920·

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. .22 Remington Automatic is highlighted below.

Factory loads

In production — 3 active loads across 3 brands. Top 15 shown · see all 20 →.

BrandLoadGrainBulletFPSft·lbBC
CCILead RN45Lead RN95090
AguilaLead RN45Lead RN95090
Sellier & BellotLead RN45Lead RN95090
RemingtonStandard40LRN1,075103
WinchesterStandard40LRN1,075103
NormaClassic45Lead Round Nose1,000100
Buffalo ArmsCustom45Lead Round Nose1,000100
KynochClassic45Lead Round Nose1,000100
HirtenbergerHP Classic45Lead RN1,000100
LapuaLapua Standard45Lead RN1,000100
RWSClassic45Lead Round Nose1,000100
RWSRWS Classic45Lead RN1,000100
FederalFederal Standard45Lead RN1,000100
PPUStandard45Lead Round Nose1,000100
EleyEley Standard45Lead RN1,000100

Velocities are manufacturer-stated (test-barrel). Discontinued loads dimmed.

Connected reference

History

Introduced in 1914 for the Remington Model 16 semi-automatic rifle. The deliberate dimensional difference from .22 LR was a safety feature. The Model 16 sold modestly but the proprietary cartridge limited its appeal, and both were discontinued before WWII.

FAQs

What twist rate does .22 Remington Automatic use?
.22 Remington Automatic typically uses a 1:16 twist rate.
What bullet diameter is .22 Remington Automatic?
.22 Remington Automatic uses a 0.223″ (5.664 mm) diameter bullet.
Is .22 Remington Automatic still in production?
.22 Remington Automatic is discontinued; typical availability is collector.
What is .22 Remington Automatic used for?
.22 Remington Automatic is primarily used for small game, target.

Sources & provenance

Data & sources. Specs compiled from the Lindcott Armory reference; availability counted from 3 live factory loads; the trajectory is modeled (point-mass), not measured. See methodology. Spotted an error? Report it →