Starline Brass 45 Auto Rim Unprimed Cases - 50 Count Bag

The Starline Brass 45RIMEUP50 delivers precision-manufactured unprimed brass cases specifically engineered for 45 Auto Rim cartridges. These cases provide handloaders with consistent wall thickness and proper headspace dimensions for reliable chambering and extraction. Each case undergoes quality control inspection to ensure uniform performance across the entire 50-piece lot.

What Makes This Different

Starline Brass cases feature drawn brass construction rather than formed brass, resulting in superior strength and longevity. The 45 Auto Rim configuration eliminates the need for moon clips in revolvers chambered for this cartridge, unlike standard 45 ACP cases. Each case maintains consistent internal capacity within 0.2 grains, ensuring uniform powder charges and predictable ballistics. The brass composition provides optimal case life, typically allowing 8-12 reloads with proper sizing techniques.

Key Features

• Precision-drawn brass construction for maximum case strength and durability
• 45 Auto Rim headspace dimensions eliminate moon clip requirements
• Consistent internal capacity variance within 0.2 grains per case
• Flash hole diameter held to ±0.002 inch tolerance for uniform ignition
• Annealed case mouths prevent splitting during bullet seating
• Compatible with all standard 45 Auto Rim chamber specifications
• 50-piece count provides sufficient quantity for load development testing

These cases perform reliably across temperature ranges from -20°F to 140°F without dimensional changes that affect chambering. Competition shooters benefit from the consistent case capacity for precision load development, while recreational handloaders appreciate the extended case life that reduces long-term ammunition costs. The rimmed design functions in both single-action and double-action revolvers without modification.

Technical Specs

• Caliber: 45 Auto Rim
• Case type: Rimmed, straight-wall
• Material: 70/30 brass alloy
• Case length: 0.898 inches
• Rim diameter: 0.512 inches
• Flash hole diameter: 0.080 inches
• Package quantity: 50 cases
• Manufacturing: Made in USA
• Primer pocket: Large pistol standard

Starline Brass maintains ISO 9001 certification and produces cases to SAAMI specifications for dimensional consistency. The 45 Auto Rim format offers handloaders flexibility in revolver platforms while maintaining the ballistic performance of 45 ACP loads. Quality control standards ensure each case meets headspace and wall thickness requirements for safe reloading practices.