What twist rate does .325 WSM use?

.325 WSM typically uses a 1:10 twist rate.

What bullet diameter is .325 WSM?

.325 WSM uses a 0.323″ (8.204 mm) diameter bullet.

Is .325 WSM still in production?

.325 WSM is active; typical availability is limited.

What is .325 WSM used for?

.325 WSM is primarily used for hunting.

What is .325 WSM based on?

.325 WSM is derived from the .300 WSM (expanded) case.

What are the best powders for .325 WSM?

Reloading powders commonly listed for .325 WSM include Reloader 19.

Rifle · SAAMI

.325 WSM

.325 Winchester Short Magnum8mm WSM8.2x53mm

Winchester's 8mm entry in the Short Magnum family — a powerful, compact round delivering near-.338 Win Mag performance in a short-action cartridge.

Caliber: 0.323″ · 8.204 mm
Introduced: 2005
Case: Rebated
Parent: .300 WSM
Primary use: Hunting
Status: Active

Velocity2,840–3,060 fps

Energy3,224–4,561 ft·lb

Typical grains180 · 200 gr

Identity

Introduced: 2005
Type: Rifle
Origin: United States
Inventor: Winchester
Manufacturer: Winchester
Standard: SAAMI
Status: Active
Availability: Limited

Build

Case capacity: 89 gr H₂O
Twist (typical): 1:10
Primer: Large Rifle
Case type: Rebated

Pressure & range

Max pressure: 65,000 psi
Eff. range: 400 yd
Max range: 900 yd
Recoil: 20–30 ft·lb

Ballistics

Real trajectory computed from a representative load — Hornady Superformance SST 180 gr, 3,060 fps, BC 0.259 G7 · 100 yd zero.

Compare tooverlay up to 2

Range	Velocity	Energy	Drop (in)	Drop (MOA)
0 yd	3059	3739	-1.5″	—
100 yd	2876	3306	0.0″	0.0
200 yd	2699	2912	-2.7″	-1.3
300 yd	2528	2553	-10.2″	-3.2
400 yd	2362	2229	-23.1″	-5.5
500 yd	2202	1938	-42.2″	-8.1
600 yd	2048	1676	-68.6″	-10.9
700 yd	1900	1442	-103.2″	-14.1
800 yd	1756	1232	-147.6″	-17.6

Point-mass G7/G1 drag model, standard atmosphere — within ~2% of reference solvers to 1000 yd; real barrels and conditions vary. Open in Ballistic Compare →

Performance

Best for HuntingHornady Superformance SST180 gr · SST · 3,060 fps · BC 0.259 G7Buy now →

Buy links open .325 WSM ammunition at Rivertown Munitions.

Dimensionscase measurements · scale drawing · size vs familiar rounds

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

CIP TDCC · verified

Measure	mm	in	✓
Bullet ⌀	8.20	0.323	✓
Neck ⌀	8.89	0.350	✓
Shoulder ⌀	13.66	0.538	✓
Shoulder angle	35°	—	✓
Base ⌀	14.10	0.555	✓
Rim ⌀	13.59	0.535	✓
Belt ⌀	n/a
Rim thickness	1.37	0.054	✓
Neck length	7.82	0.308	≈
Case length	53.34	2.100	✓
Overall length	72.64	2.860	✓

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. .325 WSM is highlighted below.

Factory loads

In production — 12 active loads across 5 brands. Top 12 shown.

Brand	Load	Grain	Bullet	FPS	ft·lb	BC
Hornady	Superformance SST	180	SST	3,060	3,742	0.259 G7
Winchester	Power Point SP	180	Power Point SP	3,060	3,742	—
Barnes	VOR-TX TTSX BT	180	TTSX BT	3,060	3,742	—
Barnes	TTSX	180	TSX-BT	3,050	3,717	—
Winchester	AccuBond CT	200	Nosler AccuBond CT	2,950	3,864	—
Nosler	Trophy Grade AccuBond	200	AccuBond	2,950	3,864	—
Winchester	Power Max	200	Power Point	2,950	3,864	—
Federal	Trophy Bonded Tip	200	Trophy Bonded Tip	2,950	3,864	—
Federal	Fusion SP	200	Fusion SP	2,950	3,864	—
Federal	Premium	200	Trophy Bonded	2,950	3,864	—
Nosler	Trophy Grade	200	AccuBond	2,950	3,864	—
Hornady	InterLock	200	SP	2,950	3,864	—

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

Suitable powders

1 reloading powder listed for .325 WSM, fastest to slowest. Cross-reference in the finder →

Reloader 19

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 $/lbCharge (gr)Bullet $/eaPrimer $/eaBrass reusesBrass $/ea

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

Firearms chambered in .325 WSM

12 models in the database chamber .325 WSM. Browse all →

Browning X-Bolt Hell's Canyon Speed .300 WSM 23-inchKimber 8400 Mountain AscentBrowning X-Bolt White Gold .270 WSMBrowning X-Bolt Hunter .270 WSM 23-inchKimber 8400 Montana .325 WSMKimber 8400 Classic .325 WSMBrowning BLR Lightweight '81 .325 WSMKimber 8400 SuperAmerica .300 Win MagKimber Montana 308 WinWinchester Model 70 Featherweight .325 WSM 2Kimber 8400 Montana 270 WSMKimber 8400 Montana 7mm WSM

Lineage

Immediate parent

.300 WSM

Family TreeOpen .325 WSM in the interactive cartridge family tree↗

Connected reference

Loads12 factory loads for .325 WSM↗Reloading1 suitable powder — cross-reference↗FirearmsFirearms in .325 WSM↗ToolCompare ballistics↗

History

Introduced in 2005 as the last addition to Winchester's WSM family. The .325 WSM was designed to give hunters .338-class performance in a short-action rifle. Factory ammunition from Winchester and Nosler remains available, though selection is limited compared to more popular WSM cartridges. The Winchester Model 70 is the primary platform.

FAQs

What twist rate does .325 WSM use?: .325 WSM typically uses a 1:10 twist rate.
What bullet diameter is .325 WSM?: .325 WSM uses a 0.323″ (8.204 mm) diameter bullet.
Is .325 WSM still in production?: .325 WSM is active; typical availability is limited.
What is .325 WSM used for?: .325 WSM is primarily used for hunting.
What is .325 WSM based on?: .325 WSM is derived from the .300 WSM (expanded) case.
What are the best powders for .325 WSM?: Reloading powders commonly listed for .325 WSM include Reloader 19.

Sources & provenance

Data & sources. Specs compiled from the Lindcott Armory reference; availability counted from 12 live factory loads; the trajectory is modeled (point-mass), not measured. See methodology. Spotted an error? Report it →