Lindcott Armory Rifle · SAAMI
.300 Winchester Magnum
Popular magnum for long-range shooting and large game hunting.
- Introduced
- 1963
- Type
- Rifle
- Origin
- United States
- Inventor
- Winchester
- Manufacturer
- Winchester
- Standard
- SAAMI
- Status
- Active
- Availability
- Abundant
- Bullet ⌀
- 0.308″
- Case length
- 2.62″
- Overall length
- 3.34″
- Base ⌀
- 0.532″
- Rim ⌀
- 0.532″
- Case capacity
- 93.8 gr H₂O
- Twist
- 1:10
- Primer
- Large Rifle Magnum
- Case type
- Belted
- Max pressure
- 64,000 psi
- Eff. range
- 1200 yd
- Max range
- 5000 yd
- Recoil
- 25–38 ft·lb
Ballistics
- Velocity
- 2,825–3,290 fps
- Energy
- 3,200–3,800 ft·lb
- By real loads
- 2,680–3,290 fps · 840 loads
- Typical MSRP
- $0.85/rd · price history →
- Parent case
- .375 H&H Magnum
Representative trajectory — modeled from a single velocity input, not a measured load. Real published loads span the "by real loads" range above.
Factory loads
In production — 840 active loads across 53 brands. Top 15 shown · see all 846 →.
| Brand | Load | Grain | Bullet | FPS | ft·lb | BC | $/rd |
|---|---|---|---|---|---|---|---|
| Hornady | Superformance SST | 150 | SST | 3,400 | 3,850 | 0.504 | $0.85 |
| Hornady | American Whitetail | 150 | InterLock BTSP | 3,290 | 3,605 | 0.338 | $0.85 |
| Remington | Premier AccuTip Boat Tail | 150 | AccuTip BT | 3,290 | 3,605 | 0.415 | $0.85 |
| Magtech | FMJ Training | 150 | FMJ | 3,290 | 3,605 | 0.338 | $0.55 |
| Hornady | American Whitetail Interlock SP | 150 | Interlock SP | 3,290 | 3,605 | 0.338 | $0.85 |
| Magtech | SP Hunting | 150 | SP | 3,290 | 3,605 | 0.338 | $0.85 |
| CBC | FMJ 150gr | 150 | FMJ | 3,290 | 3,605 | 0.338 | — |
| Remington | Express | 150 | PSP | 3,290 | 3,605 | 0.338 | $0.85 |
| Federal | Fusion SP | 150 | Fusion SP | 3,290 | 3,605 | 0.338 | $0.85 |
| Fiocchi | Extrema SST | 150 | SST Polymer Tip | 3,290 | 3,605 | 0.504 | $0.85 |
| PPU | SP Hunting | 150 | SP | 3,290 | 3,605 | 0.338 | $0.60 |
| PPU | FMJ Range | 150 | FMJ | 3,290 | 3,605 | 0.338 | $0.55 |
| Remington | Premier AccuTip | 150 | AccuTip-V Polymer Tip | 3,290 | 3,605 | 0.415 | $0.85 |
| Fiocchi | SP Hunting | 150 | SP | 3,290 | 3,605 | 0.338 | $0.85 |
| Federal | Power-Shok | 150 | SP | 3,290 | 3,605 | 0.338 | $0.85 |
Velocities are manufacturer-stated (test-barrel). Discontinued loads dimmed.
Dimensions
Suitable powders
32 reloading powders listed for .300 Winchester Magnum, fastest to slowest. Cross-reference in the finder →
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.
Firearms chambered in .300 Winchester Magnum
12 models in the database chamber .300 Winchester Magnum. Browse all →
Lineage
Drawn to one scale from published dimensions. Bottleneck shape is approximate (shoulder geometry not recorded).
Connected reference
History
Introduced by Winchester in 1963 as part of their magnum lineup. Quickly became most popular .30 magnum. Adopted by military snipers in 1990s as improvement over .308.
FAQs
- What twist rate does .300 Winchester Magnum use?
- .300 Winchester Magnum typically uses a 1:10 twist rate.
- What bullet diameter is .300 Winchester Magnum?
- .300 Winchester Magnum uses a 0.308″ (7.82 mm) diameter bullet.
- Is .300 Winchester Magnum still in production?
- .300 Winchester Magnum is active; typical availability is abundant.
- What is .300 Winchester Magnum used for?
- .300 Winchester Magnum is primarily used for hunting, military, target.
- What is .300 Winchester Magnum based on?
- .300 Winchester Magnum is derived from the .375 H&H Magnum case.
- What are the best powders for .300 Winchester Magnum?
- Reloading powders commonly listed for .300 Winchester Magnum include Superperformance, N560, Norma 204, Norma MRP, among 32 suitable options.
Data & sources. Specs compiled from the Lindcott Armory reference; availability counted from 840 live factory loads; the trajectory is modeled (point-mass), not measured. Spotted an error? Report it →