Quick Facts
| Manufacturer | Bertram |
| Cartridge | 37XC |
| Product | New, unprimed brass cartridge cases |
| Performance class | Competition ELR |
| Case type | Rimless, bottleneck |
| Standards status | XC-family .375-caliber design; verify headstamp, neck preparation, chamber, and tooling |
| Country of manufacture | Australia |
| U.S. distributor | Desert Tech Munitions |
Important: This listing is for new, unprimed brass cartridge cases only. It is not loaded ammunition and contains no primer, powder, or projectile.
Why Choose Bertram 37XC Brass?
- New-production brass for a specialized precision or magnum cartridge
- Correctly headstamped for identification and load-record management
- Manufactured by Bertram in Australia
- Imported and supported in the United States by Desert Tech Munitions
What This Cartridge Was Designed to Do
The 37XC is the .375-caliber member of David Tubb's XC cartridge family. Tubb's technical guidance explains that the 37XC is produced from the 33XC case architecture by expanding the neck for .375-caliber projectiles.
Typical Rifle Platforms
- Custom ELR bolt-action rifles chambered for 37XC
- Competition rifles using matching XC-family reamers and dies
- Purpose-built heavy-projectile .375-caliber ELR platforms
Compatibility warning: Match the brass to the exact chamber, reamer specification, dies, and rifle. This is especially important for proprietary and non-standardized ELR cartridges.
Best Suited For
- ELR competition
- Heavy .375-caliber projectiles
- Custom precision rifles
- Advanced brass and neck-preparation workflows
Did You Know?
The 37XC shares the XC case family with the 33XC; confirm whether your brass is dedicated-headstamp 37XC or formed from 33XC before setting up dies and records.
Product and Reference Specifications
| Manufacturer | Bertram |
| Condition | New |
| Primed | No |
| Material | Cartridge brass |
| Case type | Rimless, bottleneck |
| Performance class | Competition ELR |
| Standards / compatibility note | XC-family .375-caliber design; verify headstamp, neck preparation, chamber, and tooling |
| Country of manufacture | Australia |
| U.S. distributor | Desert Tech Munitions |
Precision Case Preparation
- Inspect every case before use
- Check case length, neck condition, primer pocket, and flash hole
- Use dies and bushings matched to the exact chamber and intended neck tension
- Measure loaded-round clearance before neck turning or changing neck thickness
- Track firings and annealing intervals consistently
- Use authoritative published data or the rifle builder's approved guidance
Precision-loading note: This page does not provide loading data. ELR cartridges may use proprietary chambers, custom throats, and specialized components; confirm every dimensional and pressure assumption before loading.
Availability & Production
Bertram manufactures many precision, ELR, and discontinued magnum cases in scheduled production runs. Desert Tech Munitions maintains U.S. inventory when available and supports qualified dealer and OEM buyers.
Why Buy from Desert Tech Munitions?
- Authorized U.S. Bertram distributor
- U.S. inventory and domestic shipping when available
- Direct working relationship with Bertram
- Dealer and OEM programs for qualified buyers
Frequently Asked Questions
Is this loaded ammunition?
No. This listing is for new, unprimed brass cartridge cases only.
Is this cartridge standardized?
XC-family .375-caliber design; verify headstamp, neck preparation, chamber, and tooling
Should new cases be sized before loading?
Inspect every case. Sizing, expanding, neck turning, or mandrel work should be based on the actual chamber, dies, projectile, and desired neck tension.
Why is this brass produced intermittently?
Demand is specialized, so production is generally scheduled in batches rather than maintained continuously.
Precision, ELR & Modern Magnum Collection
Select any cartridge below to view its brass, pricing, and availability.
