CCI Large Pistol Magnum Primers #350 Box of 1000

Clear Product Overview

CCI 350 Primers (Large Pistol Magnum) are specifically engineered to provide the high thermal energy required to reliably ignite dense, slow-burning spherical powders in magnum handgun cartridges. As a mainstay in CCI’s performance reloading line, these No. 350 non-corrosive, non-mercuric primers feature modern initiator compounds that burn clean and hot. Designed to prevent ignition delays and erratic pressure spikes in large-capacity cases like .44 Magnum and .45 Colt, CCI #350 primers utilize tough, precision-drawn metal cups that seat smoothly and feed reliably across automated and manual reloading systems.

Relevant Specifications

• Brand: CCI Ammunition

• Product Line: Performance Primers Series

• Primer Type: Large Pistol Magnum (No. 350)

• Quantity: Box of 1,000 (10 individual sleeve trays of 100)

• Chemical Composition: Non-Corrosive, Non-Mercuric High-Output Priming Compound

• Cup Design: Solid Precision Brass Cup with Smooth Feed Finish

• Intended Applications: .44 Remington Magnum, .454 Casull, .50 AE, .45 Colt (heavy magnum loads), .41 Remington Magnum, .480 Ruger

• Country of Origin: Made in the USA

Real-World Use Information

When assembling heavy hunting handloads or high-pressure revolver cartridges utilizing hard-to-ignite ball powders (such as Winchester 296, Hodgdon H110, or Alliant 2400), CCI 350 Primers ensure rapid flame propagation and reliable ignition. Their robust cup design resists cratering and pierced primer failures under full-house magnum pressures while seating cleanly into large pistol primer pockets. Furthermore, the clean-burning chemical formulation reduces lead and carbon buildup in cylinder gaps, frame cuts, and barrel throats, giving shooters consistent velocities across every round.

Compatibility & Requirements

• Cartridge Compatibility: Fits all standard large pistol primer pocket brass (.44 Mag, .45 Colt, .41 Mag, .50 AE, .454 Casull).

• Equipment Compatibility: Seats cleanly using standard hand priming tools, bench tools, and progressive press priming assemblies (Dillon, Hornady, Lee, RCBS).

• Safety Requirement: Always wear protective eyewear during handling, store in a cool, dry location away from heat sources, and never force a primer into an obstructed pocket.

Pros & Limitations

Pros:

• Intense Thermal Output: Produces a sustained flame front designed specifically for dense, slow-burning spherical and ball powders.

• Tough Cup Construction: Designed to handle peak magnum operating pressures without cup deformation or pierced anvils.

• Smooth Progressive Feeding: Consistent cup dimensions prevent jamming and crushed primers in automated tube feeds.

• Non-Corrosive Mix: Keeps flash holes, chambers, and bores free of corrosive pitting.

Limitations:

• Not for Standard Low-Pressure Loads: Using magnum primers in standard non-magnum target loads without adjusting starting charge data can lead to elevated chamber pressures.

• Specific Pocket Fit: Requires clean large pistol primer pockets seated flush to 0.002-0.006 inches below the case head for optimal trigger response.

Frequently Asked Questions (FAQs)

Q: What is the difference between CCI #300 and CCI #350 primers?

A: CCI #300 is a standard large pistol primer, whereas CCI #350 is a large pistol magnum primer. The #350 provides a hotter, longer flame duration designed to ignite slow-burning powders commonly used in magnum handgun cartridges.

Q: Can I use CCI 350 primers for loading .44 Magnum?

A: Yes, CCI #350 primers are an ideal choice for .44 Magnum reloading, especially when using spherical propellants like H110 or W296.

Q: Do CCI 350 primers come in plastic sleeve trays?

A: Yes, the 1,000-count box contains 10 individual 100-count sleeve trays designed for easy insertion into priming tools and loader tubes.

Shipping & Delivery Information

• HazMat Classification: Ships as Hazardous Material (UN0044, Primers, Cap Type) under DOT rules.

• Shipping Restrictions: Ships by ground inside the Continental United States only. Therefore, we cannot ship to P.O. Boxes, APO/FPO locations, or overseas.

• Adult Signature Required: An adult must sign for the package upon delivery.

• Final Sale: Due to federal safety rules for hazardous materials, all primer sales are final and non-returnable.