Speer Hot-Cor 303 Caliber 7.7mm Japanese 180 Grain RN Bullets (Box of 100)

Speer Hot-Cor 303 caliber 7.7mm Japanese rifle bullets deliver the consistency and reliability that reloaders depend on for both historical military rifle shooting and hunting applications. Built using Speer's proven Hot-Cor process—molten lead poured directly into the jacket—these 180-grain round nose bullets achieve uniform construction that translates to tighter groups and predictable ballistics across your loads. If you're handloading for a .303 British, Arisaka, or other 7.7mm Japanese rifle, you'll appreciate the precision and availability of a component engineered specifically for your caliber.

The Hot-Cor manufacturing method creates a molecular bond between core and jacket that resists separation under stress, which matters whether you're working up loads at the range or preparing ammunition for the field. The 180-grain round nose profile suits medium-game hunting and target shooting, offering a balance of velocity, energy retention, and bullet construction that works across a range of powders and primers. At 100 rounds per box, you get enough components to develop and test your loads without breaking the bank.

Reloaders choosing Speer over cast or plated alternatives get the benefit of a major ammunition manufacturer's quality control and decades of ballistic data. The Hot-Cor process also allows Speer to offer bullets in calibers—like 7.7mm Japanese—that many competitors overlook, so you're not forced to substitute or compromise on fit and performance. Whether you're a precision handloader chasing accuracy or someone who simply wants reliable, consistent components, Speer Hot-Cor bullets are purpose-built for the reload bench.

Key Features

• Hot-Cor construction: molten lead poured directly into jacket for uniform density and core-jacket bonding
• 180-grain round nose profile optimized for .303 and 7.7mm Japanese rifle cartridges
• Manufactured to Speer's precision standards for consistent ballistics and handload repeatability
• Box of 100 bullets—economical quantity for load development and practice
• Designed for hunters and reloaders who demand quality in a hard-to-find caliber

Specifications

Frequently Asked Questions

Are these bullets suitable for .303 British rifles?

Yes. The 303 caliber designation covers .303 British and related 7.7mm cartridges, including 7.7mm Japanese military rifles like the Arisaka. These 180-grain bullets are sized and designed for use in those rifles.

What is the Hot-Cor process and why does it matter?

Speer's Hot-Cor process pours molten lead directly into the copper jacket, creating a stronger bond between core and jacket than traditional swaging. This results in more consistent bullet weight, better uniformity, and improved reliability under firing conditions.

What's included in a box?

Each box contains 100 loose bullets, ready for your reloading press. They are components only—no cases, powder, or primers.

Can I use these for hunting as well as target shooting?

Yes. The 180-grain round nose profile is suitable for both precision target work and medium-game hunting applications where your rifle and load development permit.