Quote:
Originally Posted by JHB51
The bullet is steel with a lead core and copper plating out side. The steel case doesn't wear out the barrel but the steel bullet driven down a steel barrel does. The copper plating is not thick enough to prevent steel on steel.
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But that only applies to certain steel cased ammo... not all steel cased ammo is equal.
I've used the offending ammo from the Lucky Gunner test. I've also used Hornady steel cased ammo, which is a lead bullet with copper jacket... same projectile as used in their brass cased ammo.
Also, there was another discussion that I had linked to at one time that theorized that it was not the bi-metal jacket that caused the wear, but the propellant that was used... I'll have to see if I can find that again.