The Barnes Originals Semi-Spitzer bullets are a handloading option introduced in 1939 and intended for hunters and reloaders who prioritize consistent expansion and weight retention. These 300 grain SSSP bullets for .45-70 Gov (.458″) were designed with pressure-formed copper tubing around a solid lead core to deliver controlled expansion and high retained weight. Each box contains 50 bullets for reloaders who assemble ammunition for field or range use.
Key Specifications
- The caliber is .45-70 Gov (.458″).
- The bullet weight is 300 gr.
- The profile is Semi-Spitzer (SSSP).
- Each box contains 50 bullets.
- Construction uses pressure-formed 100% copper tubing around a solid lead core.
- Designed to expand over 200% of original diameter upon impact.
- Can retain up to 90% of initial weight.
- Introduced to the market in 1939.
- Intended for handloading and hunting applications.
These Barnes Originals Semi-Spitzer bullets offer reloaders a historically established design focused on repeatable expansion and high weight retention. Their pressure-formed copper construction supports consistent performance for responsible hunting and precision handloading routines.









