Boxer Primer
Definition
Primer design with a self-contained anvil inside the primer cup assembly and a single central flash hole in the case. Standard for US commercial production (CCI, Federal, Winchester) and Lake City military. Allows case reloading.
- Anvil location
- Integral to the primer cup
- Flash holes
- Single, central
- Common in
- US commercial ammunition, Lake City military production
- Reloadable
- Yes, with standard decapping equipment
Common questions
How does a Boxer primer differ from a Berdan primer in examination?+
A Boxer primer carries its own anvil inside the cup and has one central flash hole in the case, so a decapping pin can push straight through to remove it. A Berdan case has the anvil built into the case itself with two off-centre flash holes, which changes how it must be deprimed and reloaded.
Why does Boxer priming matter for a reloading investigation?+
Because Boxer cases are easily reloaded with common tools, the presence of reload indicators such as resizing marks or mismatched headstamp and bullet types is more forensically significant in Boxer-primed brass than in less commonly reloaded systems.
Related terms
- Berdan Primer
- Primer design where the anvil is integral to the cartridge case; primer cup contains only the explosive compound. Identified by two offset...
- Double-Base Powder
- A smokeless propellant combining nitrocellulose and nitroglycerin (10-40% NG by mass). Higher energy density and flame temperature than single-base; standard for handgun...
- Lead Styphnate
- Lead trinitroresorcinate (Pb(C6H(NO2)3O2)), the primary explosive in conventional primer compounds. Co-oxidised with barium nitrate and antimony sulfide to produce the Pb-Ba-Sb triad...
- MAP (Maximum Average Pressure)
- The SAAMI statistical upper bound for chamber pressure in a given cartridge specification, expressed in PSI. The CIP equivalent is published in...
- Single-Base Powder
- A smokeless propellant using nitrocellulose as the sole energetic component, typically 12.6-13.0% nitrogen content, plasticised for stability. Lower flame temperature than double-base;...
- SINTOX
- A lead-free, heavy-metal-free primer formulation developed by DAG (Deutsche Ammunitions- und Geschossfabrik) and Geco in Germany in the 1990s-2000s, replacing lead styphnate...