I know steel is bad but is there any issues with nickel plated ammo such as http://www.aimsurplus.com/product.aspx?item=A308Ger
as a side note does anybody know how this stuff shoots?
In a regular chrom lined barrel I would not really see a problem with it... providing your rifle will shoot and function properly with 147gr ammo.
Reading the owners manual a few times,
Projectiles between 150 grain and 175
grain weight provide a good combination of accuracy and functional reliability, with 168 grain
Well, it's not really nickel plated, it's a copper/nickel blend, just comes out bright white. It's clean and accurate ammo that is supposed to fragment pretty nastily on impact and resist corrosion. It is harder than copper and I think the reason we're seeing the influx of the DAG into the civilian market is that they decided to go back to copper as the CuNi stuff was harder on barrels. Unless you're doing a LOT of shooting in very expensive barrels, however, the money you save on ammo will pay for replacing a typical AR barrel by the time you manage to shoot it out. If you're not doing a lot of shooting, the difference won't matter anyway. I've seen some concerns that people have over copper solvents not being able to remove the CuNi residue in the barrel, but no real scientific studies.
I found this discussion over on another board that seems to be a little more well researched than average.
DAG Discussion at SnipersHide
I'd like to hear what Armalite has to say too, assuming there is an official position besides the standard "We recommend 168gr moly-coated bullets."