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This .300 Winchester Magnum load sits in that sweet spot where velocity meets versatility. The 165-grain bullet weight balances the speed of lighter loads with the knockdown power of heavier options, making it equally at home on whitetail at 400 yards or elk at closer range. The jacketed soft point design provides controlled expansion that's been proven in the field without the over-expansion problems some lighter magnums can suffer from at magnum velocities.
The brass cases come loaded and ready to go, but they're also boxer-primed and fully reloadable if you want to stretch the value of every box. That matters to folks who take hunting seriously and want to reload their own. The 20-round box format is standard for quality factory ammunition and gives you plenty of ammo for a season or range sessions without overkill storage.
The .300 Winchester Magnum itself is the most popular .30-caliber magnum among North American hunters for good reason. It delivers flat trajectory and high kinetic energy out of a standard long-action rifle, and the 165-grain bullet weight specifically offers a higher ballistic coefficient than lighter options while keeping velocity high. That means less wind drift and better energy retention at distance, which matters when you're counting on an ethical kill. The round typically leaves the muzzle around 3,100-3,160 fps, giving you plenty of reach without excessive recoil compared to 180-grain loads.
HSM has been manufacturing ammunition in Montana for over five decades with a reputation built on tight quality control. Every cartridge gets inspected and tested before packaging to ensure velocity and accuracy consistency from round to round.
This load works well for medium to large game including whitetail and mule deer at extended ranges, and for elk and moose when shot placement is solid. The 165-grain bullet offers a good balance of velocity and penetration. Some hunters prefer 180-grain or heavier loads for the largest game, but the 165-grain has taken plenty of big animals and remains popular for its flatter trajectory.
Yes, the brass cases are boxer-primed and fully reloadable. Many hunters save and reload HSM brass to reduce ammo costs over time. Make sure you inspect cases before reloading and follow proper reloading procedures for the .300 Win Mag, which uses a large powder charge.
The 165-grain offers higher velocity than heavier 180 or 200-grain loads while keeping a higher ballistic coefficient than 150-grain bullets. It's a middle-ground choice that works across different hunting scenarios. The 180-grain is the most popular weight overall, but many hunters prefer 165-grain for its flatter trajectory and reduced recoil.
HSM manufactures ammunition in Montana with strict quality control on every cartridge. The company has built its reputation on consistency and has supplied ammunition to law enforcement and government agencies. Each round is inspected and tested before packaging to ensure velocity and accuracy consistency from box to box.
| Caliber/Gauge | .300 Winchester Magnum |
|---|---|
| Case Material | Brass |
| Cost per Round | 2.85 |
| Grains | 165 gr |
| Length | 6.1500 |
| Manufacturer | |
| Manufacturer Part Number | 300WINMAG40N |
| Units per Box | 20 |
| UPC | 810742023089 |
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