The extra fouling you get comes from the fact that steel cased ammo doesn't obturate (swell up and close) the chamber as efficiently as brass. I've shot steel case out of my AR's and 1911 and not had any problems aside from fouling. It should REALLY foul up an HK91 with a fluted chamber though, considering how bad brass ammo fouls one.

John Ross, you know "the author" - shoots nothing but Tula ammo through his guns when he does a rental shoot. I know, I was at one. He's got some rare stuff too.

Opinions vary, but having worked with a few russians "over there" they tend to be tinkerers and they definitely dont like it when something they make doesn't work. I don't think there's a commie plot to break our guns. I shoot a FAL when I do shoot 308 and occasionally shoot steel case, but the FAL extractor is MASSIVE. I would think that with any gas-adjustable system you just make sure you don't shoot it full-open to ease up the abuse your extractor takes - which you'd do anyway for brass. The extractors on my Garand's, if they're comparable to the M1A, seem about half as big as my FAL's. But, again, tuning your rifle to shoot your ammo should be part of any regime, whether it's brass or steel. Not all milsurp is quality, I'd shoot Tula over milsurp if I had a choice. But hell, I shoot it all up when I can - so it's not like the milsurp WONT get shot, it just wont get shot first!

Just my 2 devalued cents