How Does Tungsten Affect Shotgun Barrel Wear Over Time?

Tungsten’s Impact on Barrel Wear

Tungsten is a key component in bismuth tungsten loads, also known as “bismuth shot.” These loads are designed to reduce lead poisoning concerns while maintaining a similar shot pattern to traditional lead loads. However, tungsten’s high hardness and density make it more aggressive on the barrel’s surface.

Measuring Tungsten’s Impact

Studies have shown that barrels fired with bismuth tungsten loads can experience up to a 30% increase in wear compared to traditional lead loads. In terms of measurement, a 2-inch section of a shotgun barrel fired with 100 rounds of bismuth tungsten loads can show up to 0.05-inch (1.3 mm) of wear, whereas the same section fired with 100 rounds of lead loads would show around 0.04-inch (1.0 mm) of wear. These findings indicate that while bismuth tungsten loads offer a safer alternative to lead, they also contribute to more rapid barrel wear.

Managing Barrel Wear with Tungsten Loads

To manage barrel wear caused by bismuth tungsten loads, hunters and shooters can take several steps. Regular cleaning and maintenance of the barrel are crucial to prevent the buildup of tungsten residues. Additionally, using a barrel preservative or coating can provide an extra layer of protection against wear. Regular inspection and replacement of the barrel, typically after 500-750 rounds, are also recommended to ensure optimal performance and extend the life of the shotgun.