Last reviewed: 2026-04-19 by Jake Terry, FFL07/SOT3, NRA-certified firearms instructor.
For hunters operating under lead-free mandates or choosing non-toxic projectiles by preference, the Sellier & Bellot Exergy Blue in 300 Winchester Magnum offers a solid copper alternative without compromising terminal performance. This load pushes a 180-grain polymer-tipped bullet at 2753 fps from a 23.5-inch barrel, delivering 3028 foot-pounds at the muzzle. The boat-tail base and pointed tip yield a flat trajectory across elk-country distances, while the monolithic copper core ensures near-100% weight retention on impact. Sellier & Bellot has manufactured cartridge ammunition since 1825; as part of the CBC/Magtech group since 2009, the Czech manufacturer maintains European production standards and global distribution. This 300 Winchester Magnum lead free ammo ships in boxer-primed, reloadable brass cases—ready for hunters pursuing mule deer, elk, or bear on public land where lead bans are enforced.
Built for the Box
The Exergy Blue projectile uses a blue polymer tip to initiate expansion on contact, driving the hollow-point cavity rearward through the solid copper shank. At magnum velocities, the monolithic construction sheds no core material, maintaining sectional density through hide, bone, and tissue. The 0.442 G1 ballistic coefficient keeps wind drift manageable out to 400 yards; the 0.271 sectional density punches through heavy shoulder structure on quartering shots. Brass cases carry non-corrosive boxer primers and accept standard large-rifle primers on reload. Each 20-round box ships in a cardboard tray with a plastic lid.
Specs at a Glance
| Spec | Value |
|---|---|
| Caliber | 300 Winchester Magnum |
| Bullet weight | 180 Grains |
| Bullet type | Polymer Tip (Solid Copper) |
| Muzzle velocity | 2753 fps |
| Muzzle energy | 3028 ft-lbs |
| G1 BC | 0.442 |
| Sectional density | 0.271 |
| Test barrel length | 23.5 Inches |
| Rounds/box | 20 |
| Case | Brass (Reloadable) |
| Primer | Boxer |
| Corrosive | No |
| Lead free | Yes |
| Intended use | Hunting |
| Manufacturer | Sellier & Bellot |
California’s non-lead hunting zones, Condor Range compliance areas, and similar regulations across Western states make this load a practical choice for hunters drawing tags in restricted units. For additional magnum rifle loads, browse our full 300 Win Mag ammo inventory.
Safe Handling & Compliance
Federal law requires purchasers to be at least 18 years old for rifle and shotgun ammunition, and at least 21 for handgun ammunition. Ammunition cannot be shipped to certain states, counties, and cities — review our ammunition shipping restrictions before ordering. Store ammunition in a cool, dry location away from heat sources and out of reach of unauthorized users.
- Observe the four universal rules of firearms safety on every range trip and hunt.
- Verify current state and local laws regarding lead-free ammunition mandates in your hunting unit before heading afield.
- This product contains materials known to the State of California to cause cancer and birth defects or other reproductive harm under Proposition 65. Despite lead-free projectile construction, brass cases and primers may still trigger Prop 65 labeling. Visit www.P65Warnings.ca.gov for details.
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