So I just purchased my first AR-15 last week (Windham Weaponry MPC $729.99), and I am now looking to purchase 1000 rounds of .223 to go shooting. So my question is: For trianing/plinking/messing around would you recommend purchasing Wolf Poly or Wolf Gold? The poly is obviously the standard steel case russian ammo, and the gold is brass cased with a FMJ lead core bullet (not bimetal). I found the Wolf Gold for $339.99/1000rds and the Poly for $287.00/1000rds. (Difference roughly ~$55.00) The reason I am asking is because I found this article: http://www.luckygunner.com/labs/brass-vs-steel-cased-ammo/ Essentially, since a new barrel and components kit costs roughly $250.00 (even checked windhams website), would you guys just shoot steel case ammo for thousands of rounds and just purchase a new barrel kit with the money saved by shooting the cheaper ammo? Obviously the steel cased ammo barrel would need to be re-barreled far sooner than the brass based ammo barrel. More than likely would replace the extractor also if not earlier. After 5000 rounds, the barrel kit has paid for itself, and I'm just trying to make sure my though process isn't overlooking anything. For serious use, I'm gonna stock up on XM193, but I'm just wanting some input for target rounds. I'm planning on shooting a good amount through this rifle. I've heard that the Wolf Gold brass is really soft, and thus is usually only good for 3 reloads, but maybe someone can comment on that also. Thanks!