Often people comment on how dirty a certain brand of ammo is. It's all dirty AFAIK but sometime after using a certain brand, type or vintage you are left wondering "what did they put in this?"
So what's the dirtiest, filthiest, most bore-fouling ammo you've ever used? Black powder doesnt' count.
I'll start. About a year ago Palmetto had a deal on cases of Yugo 7.62x39. Case of 1260 rounds shipped for something like $199. I jumped at the opportunity to feed my Yugo SKS.
Received said bewlitts several days later and anxiously opened the beat up crate. Inside was not a hermetically sealed can of Iron Curtain ammo packaged to last for generations but 84 flimsy white boxes with about 15 rounds apiece of brass cased, lead core, mildly corrosive Yugo ammo. Supposed to be some of the best (and it is). Looks like they were all picked up of some warehouse or cave floor and packed in those cheap boxes. Hands are filthy after loading up a stripper clip, finger black from grime. Each box of 15 has at least 3 or 4 years worth of headstamps, but that's ok as it all comes from the same factory, Prvi Partisan.
When shooting the ammo it's like a musket going off. Smoke everywhere. I think they scooped up powder off the ground, mixed in some dirt, maybe sawdust and Serbian sweat for good measure. It is accurate and sure firing but dang, the clean up is a chore. Patch after patch of black.