More guns are damaged due to neglect than actual shooting. Many of today's dangerous game bullets are fouling monsters. The Hornady Dangerous Game series, whether soft or solid, employ a steel jacket that is plated with a small amount of copper to preserve your barrels rifling. That copper is very soft and after a good days shooting, you will swear you have a plague of copper. The Barnes solids can mix up with your other gilding metal bullets and the fouling will be severe. Modern copper removers such as Wipe Out are a real blessing.

Keep your barrel clean, and your gun properly lubricated, and you will have your .458 for a lifetime.