Ok, yea we went through an ammo shortage in the US, ammo was cheap before that, actually steel cased and bi-metal projectiles weren't common at all; then all of the sudden we are bombarded with 1/3 priced steel range ammo that a lot of indoor ranges won't even allow because the projectiles are bi-metal lead/steel core, steel lined, then a tiny coating of brass over all that. OK, steel vs brass, obviously the brass WWB, Fed, etc won't damage your firearm's barrel, I'm starting to become concerened that if I continue shooting this Tulammo due to the fact the grooves in a barrel scrape off the brass exposing the steel of the Tulammo. Then there's the whole issue about instead of brass dust being left in your firearm, now you have steel dust in your firearm and it WILL RUST, and that rust will mess up your firearm.
Go to the range, fire about 100-200 rds of this stuff through your gun (I've fired thousands of rds of it in 25,380, 9mm, 40, and 7.62x39 and they did actually all go bang) go home and clean your gun. You'll notice significantly more soot, carbon, and debris in your gun. Personally I clean the hell out of my guns after running this stuff through them after seeing basically a brass barrel and finding all the left overs in the action. Pretty much, this ammo, in my opinion- it's only good for like a breaking in or "getting to know a weapon", (you experienced shooters know what I mean) aside from that go back to the few extra dollar good-for-your-gun ammo for sighting in, weekly practice or however you practice shooting. In my opinion, you run a huge risk of damaging your weapon with switching exclusively to this stuff for range ammo. Bare minimum this stuff DEMANDS 5 TIMES MORE TIME TO CLEAN YOUR FIREARM AFTER USING THIS STUFF, and you're risking losing an accurate barrel.