So I have been looking at ammo and posts around the internet. Can't believe some of the stuff I read. Like this: "Bullet friction does not wear out a barrel. It is the hot combustion gasses that melt away the steel. If friction was the primary cause, the barrel at the muzzle would go first." WHAT?!?!? I found a good article here USPSA Member Discounts and Promotions - United States Practical Shooting Association The copper 'jacket' is only microns thick...over STEEL....not the same as a true cupro nickle jacket. If I am in an "End of World" scenario, I wouldn't care about my ammo as long as I had some and it worked...everytime! As for cheap shooting, I am building a 9mm AR carbine...just for that...and to have another AR! I make ammo so I can get tons of 9mm for almost free! I can make 1000 rds of 9mm in about 40 minutes. And here is another great test about steel case versus brass case ammo. I know most steel case ammo is loaded with bi metal (steel jacketed) bullets. If I am wrong, please post a link to the steel ammo with normal copper (cupro nickel) bullets. Here is the test on Lucky Gunner. Brass vs. Steel Cased Ammo - An Epic Torture Test