Re: DAG ammo safe for my bolt gun?
The DAG is German surplus ammo. I tried some in my Mauser 98 "sniper" version (1/12twist) and in my Tikka (1/11 twist). It shot minute of barn.
With MEN surplus ammo, also German, I can hold one MOA at 300 meter! Great stuff, since I finished my 600 rounds I'm looking for more. The sources are well dried out.
To the original question: I did not see any negative effects on my rifles. The nickel is there to prevent the copper from corrosion.
Some time ago I shot FNM (Portugese) surplus ammo. Accuracy was about 1,5 to 2 MOA at 100m at best. After about 300 rounds precision went apebooboo. I had serious copper build up in the barrel. After removing with Robla Solo( ammonia based solvent) accuracy went back to normal.
Since then I started reloading. For my Tikka nothing beats Lapua brass and bullets. Usually I use the 170 grs lockbase, great stuff...