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HSM's Game King line brings serious hunting performance to classic military rifles and vintage sporting arms. Each load pairs Sierra's time-tested Pro-Hunter bullets with components specifically tuned for the 303 British, so your rifle gets the kind of consistency you'd expect from careful handload work straight from the box.
The Sierra Pro-Hunter profile does what it's supposed to do without drama. The tapered jacket and soft-point design deliver controlled expansion at moderate velocities—you get the penetration and energy transfer hunters need without explosive fragmentation that wastes meat. For medium game out to reasonable hunting distances, this is a bullet that simply works.
The 180-grain load sits in that practical sweet spot for the 303 British. It carries better at range than lighter loads and maintains the penetration this cartridge is known for. Whether you're running a Lee-Enfield, sporterized military rifle, or a custom build, these are high-quality factory loads that rival the consistency of custom ammunition at a much lower cost. All ammunition is loaded in reloadable brass cases for shooters who want to extend the life of their investment.
HSM has been making ammunition in Montana since 1968, supplying law enforcement and hunters with loads that work. The Game King line represents their hunting-focused approach—quality components matched precisely for each caliber. You get non-corrosive, boxer-primed brass that chambers smoothly and extracts cleanly.
Yes. HSM has been manufacturing ammunition since 1968 and has a strong track record supplying ammunition to law enforcement and military users. Their Game King line specifically pairs carefully matched components with proven Sierra bullets, delivering consistent performance in the field. The company is based in Montana and maintains strict quality control standards across their facility.
The 180-grain load is well-suited for medium game including deer, wild boar, and similar-sized animals at moderate hunting ranges. The Sierra Pro-Hunter bullet is designed for good penetration and controlled expansion, making it practical for clean, ethical kills at typical hunting distances.
Yes. HSM loads their ammunition in boxer-primed, reloadable brass cases, so after firing you can resize and reload them if you have reloading equipment and knowledge. This gives you the option to extend the value of each round.
Yes, this ammunition is loaded to standard 303 British specifications and will work in any properly functioning rifle chambered for the 303 British caliber. Before shooting any surplus rifle, it's a good idea to have it inspected by a gunsmith to make sure it's safe and headspaces correctly.
| Caliber/Gauge | .303 British |
|---|---|
| Case Material | Brass |
| Cost per Round | 2.55 |
| Grains | 180 gr |
| Manufacturer | |
| Manufacturer Part Number | 303BRIT4N |
| Units per Box | 20 |
| UPC | 810742023836 |
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