Bertram 375 H&H Flanged Magnum (375 Nitro Express)

Bertram 375 H&H Flanged Magnum (375 Nitro Express)

Bertram
$155.50 - $647.90
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Description

Quick Facts

Manufacturer Bertram
Cartridge .375 H&H Flanged Magnum (aka: 375 Nitro Express)
Product New, unprimed brass cartridge cases
Case type Rimmed, bottleneck
Country of manufacture Australia
U.S. distributor Desert Tech Munitions

Important: This listing is for brass cartridge cases only. It is not loaded ammunition and contains no primer, powder, or projectile.

Why Choose Bertram .375 H&H Flanged Magnum Brass?

  • New-production brass for a specialized cartridge with limited commercial availability
  • Manufactured by Bertram, a specialist in rare, obsolete, and large-bore cartridge cases
  • Reloadable cases for properly chambered firearms
  • Imported and supported in the United States by Desert Tech Munitions
  • Available for individual, dealer, gunsmith, and qualified OEM requirements

Who This Product Is For

  • Handloaders maintaining rifles chambered in .375 H&H Flanged Magnum
  • Owners and collectors of historic or specialty sporting rifles
  • Gunsmiths restoring or regulating rifles in the original chambering
  • Dealers and ammunition manufacturers serving specialty-cartridge customers

Cartridge at a Glance

Origin Great Britain
Primary role Flanged dangerous-game and general-purpose hunting cartridge for double and single-shot rifles
Case design Rimmed, bottleneck
Collection Safari & Dangerous Game

Cartridge Profile: .375 H&H Flanged Magnum

The .375 H&H Flanged Magnum is the rimmed counterpart to the famous .375 H&H Magnum family. The flanged case was intended for dependable extraction in double rifles and other break-action firearms. It must not be confused with the belted, rimless .375 H&H Magnum used primarily in bolt-action rifles.

Today, new brass for this chambering is generally produced in scheduled or limited runs. Bertram cases give handloaders a new-production option without relying exclusively on aging original cases or extensive case conversion.

Rifle and Chamber Compatibility

Double rifles and single-shot rifles specifically chambered in .375 H&H Flanged Magnum. Do not use in rifles marked only .375 H&H Magnum.

Compatibility warning: Similar cartridge names do not guarantee interchangeability. Always verify the exact chamber marking, case dimensions, dies, shellholder, and published loading information before use.

Product Specifications

Manufacturer Bertram
Cartridge .375 H&H Flanged Magnum
Condition New
Primed No
Material Cartridge brass
Reloadable Yes, when inspected, prepared, and loaded correctly
Country of manufacture Australia

Case Preparation Before Loading

  • Inspect every case before use
  • Check the case mouth, neck, body, primer pocket, and flash hole
  • Run an expander through the neck or full-length size when appropriate
  • Chamfer, deburr, and measure as needed
  • Confirm that dies, shellholder, primer, projectile, and published load data match the exact cartridge
  • Use conservative, firearm-appropriate loading practices, especially with historic rifles

Reloading note: Bulk packaging and transportation may leave some case mouths slightly out of round or produce minor cosmetic marks. Inspect and prepare every case before loading.

Availability

Bertram manufactures many specialty calibers in scheduled production runs. When this brass is unavailable, use the stock notification on the product page or contact Desert Tech Munitions regarding expected incoming inventory, dealer quantities, or OEM requirements.

Why Buy from Desert Tech Munitions?

  • Authorized U.S. Bertram distributor
  • U.S. inventory and domestic shipping when available
  • Direct working relationship with Bertram
  • Support for rare and specialty cartridge brass
  • Dealer and OEM programs for qualified buyers

Frequently Asked Questions

Is this loaded .375 H&H Flanged Magnum ammunition?

No. This listing is for new, unprimed brass cartridge cases only.

Who manufactures this brass?

Bertram manufactures these cases in Australia.

Can this brass be reloaded?

Yes. Case life depends on chamber dimensions, load pressure, sizing practices, preparation, and inspection between loadings.

Should I size new cases before loading them?

Inspect every case before use. Running an expander through the neck or full-length sizing may be appropriate before the first loading.

Will this brass fit a similarly named cartridge?

Not necessarily. Verify the exact chamber designation and dimensions. Similar names, bullet diameters, or case lengths do not establish interchangeability.

Can Desert Tech Munitions supply dealer or OEM quantities?

Yes. Qualified dealers and manufacturers may contact Desert Tech Munitions for current program requirements, pricing, and availability.

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