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375 Winchester Ammo

Built for Big-Game Confidence

Few cartridges embody practical, real-world stopping power like the .375 Winchester. Designed for the Winchester 94 Big Bore and Marlin 375, this powerhouse brings modern pressure capability and knock-down energy to classic lever-action rifles. At Steinel Ammunition, our .375 Winchester ammo is crafted for hunters who need reliable terminal effectiveness, whether you’re tracking whitetail in the Midwest or bracing for a close-range encounter with a black bear.

Our philosophy at Steinel Ammo is simple: terminal performance isn’t theory, it’s field-proven practicality. That’s why every load we produce is engineered to perform when it counts.

  • 375 Winchester 255gr RNFP Cast and Coated
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    375 Winchester 255gr RNFP Cast and Coated

    $40.89
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  • 375 Winchester 200gr Solid Copper Hollow Point
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    375 Winchester 200gr Solid Copper Hollow Point

    $52.22
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  • 375 Winchester 280gr Flat Nose Hard Cast
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    375 Winchester 280gr Flat Nose Hard Cast

    $46.56
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  • 375 Winchester 245gr Round Nose Flat Point
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    375 Winchester 245gr Round Nose Flat Point

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    $42.92
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.375 Winchester Ammunition Designed for Hunting & Big-Game Use

Born in 1978 as a modernized successor to the .38-55 Winchester, the .375 Winchester cartridge was built for power in compact rifles. With energy approaching .30-06 levels at short range, it’s a favorite among lever-gun hunters who value quick handling, decisive impact, and confidence in thick timber.
Our Steinel .375 Winchester loads are designed for:

  • Medium to Big Game Hunting: Deer, elk, and black bear.
  • Lever-Gun Performance: Optimized for rifles like the Winchester 94 Big Bore and Marlin 375.
  • Reliability in the Field: Consistent ignition, dependable cycling, and terminal performance you can trust.

These are premium cartridges that deliver modern consistency with old-school authority.

Ballistics, Load Details & Typical Bullet Weights

The .375 Winchester fires bullets in the 200 to 255-grain range, typically achieving 2,000 to 2,200 fps muzzle velocity with impressive energy retention beyond 100 yards. Steinel’s load offerings are tailored to this cartridge’s strengths, offering clean burn, manageable recoil, and deep, controlled penetration for ethical hunting shots. Our focus is on bullet weight and balance, not just raw speed. That means you’ll see predictable trajectories and reliable expansion from shot to shot. We build ammunition that works when you’re breathing hard in the cold and the brush is thick.

Choosing the Right .375 Winchester Ammo for Your Rifle  

Selecting the right load depends on your platform and your purpose:

  • For Deer: Our 200-grain Solid Copper Hollow Point .375 Winchester load delivers the perfect blend of expansion and penetration for clean, ethical kills.
  • For Elk, Bear Defense, or Heavy Game: Step up to our improved 295-grain hard-cast option, engineered for maximum straight-line penetration and controlled recoil in lever-action rifles.
  • For Range and Practice: Consistent pressure, clean burn, and high-quality brass mean you can train without fouling or fatigue.

Every load is proudly manufactured in the USA.

How We Develop and Validate Our .375 Winchester Loads

Our .375 Winchester ammunition undergoes careful evaluation for:

  • Pressure and Velocity Stability: Every load is engineered to ensure consistent pressure and velocity.
  • Terminal Effectiveness Modeling: Bullet expansion, penetration, and energy transfer are validated through controlled testing and field feedback.
  • Rifle Compatibility: Each load is developed with modern Winchester 94 Big Bore and Marlin 375 platforms in mind, ensuring reliable cycling and clean extraction.

FAQs: .375 Winchester Ammunition

Q1) What is the .375 Winchester cartridge used for?

A) The .375 Winchester is a high-pressure lever-gun cartridge designed for medium to large game. It’s popular for close-to-mid-range hunting in dense woods where power and fast follow-up shots matter.

Q2) Is .375 Winchester suitable for deer and elk hunting?

A) Absolutely. With bullet weights around 200-300 grains, .375 Winchester ammo offers excellent energy and expansion for deer, elk, and even black bear within 150 yards.

Q3) What’s the difference between .375 Winchester and .38-55 Winchester?

A) The .375 Winchester is a modern, higher-pressure evolution of the .38-55 Winchester. While they share case lineage, .375 Winchester loads generate higher velocity and should only be fired in rifles chambered for .375 Win not older .38-55 guns.

Q4) What is the effective range of .375 Winchester ammo?

A) Optimal hunting range is typically 0-150 yards, depending on rifle and load. Beyond that, trajectory drop and energy loss become notable, but accuracy remains reliable for experienced shooters.

Q5) Is Steinel .375 Winchester ammo safe for older rifles?

A) Steinel’s .375 Winchester loads are intended for modern, strong actions like the Winchester 94 Big Bore and Marlin 375. They are not safe in rifles chambered  in .38-55.

 

Built for Hunters Who Respect the Rifle

At Steinel Ammo, we build .375 Winchester ammo the way it should be built: dependable, accurate, and ready to perform where it matters most.
Experience American-made performance crafted for real-world hunters.

Got questions?
Get in touch for expert guidance on choosing the right load for your rifle.