adguy,
if you have a small magnet, even a refrigerator magnet will do....touch the magnet to the cartridge case. If the magnet grabs the case then it is steel, which is what most of the Russian ammo uses. Several Russian companies make good steel cased ammo, like the Brown Bear brand which uses a copper coating on it's steel case. But the olive drab colored Russian ammo is probably laquer coated.
Another thing you can do is use your pocket knife and see if you can scrape any of the coating off. If it sort of peels off like paint, then it's laquer.
Like Leland said, the laquer will gum up your pistol or rifle and be a mess to clean.
Regardless, I would not recommend steel cased ammo in "modern" handguns. That stuff works fine in the old Russian Makarov and some surplus Russian rifles that were designed to use it.
Unless it's a Makarov pistol or Russian rifle I would stick to good American made ammo, like Federal, Remington, Winchester, CorBon, etc.
But it's your call.
Cheers,
og..........(been there, done that!!)