OK guys, just when I thought I had seen everything, along comes this bullet.
I have an ordinary looking 7.62x53Rmm Russian cartridge
Flat brass colored Berdan primer, 2 flash holes
No primer crimp or pa color
Magnetic GM colored pointed FMJ bullet, 166.9 grains weight.
Roll cannelure in bullet about 1/8" above case mouth
The case has a very large corroded spot at the shoulder so I decided to pull the bullet to see what the powder was and what the bullet looked like. Tried an inertia puller but the bullet would only come part way out so I grabbed it with a pair of pliers and pulled it the rest of the way.
Much to my surprise there appeared to be tuft of cotton or wool or “something” sticking out of the bullet base. Closer inspection showed that this “stuff” was very hard like plaster or concrete, appeared to have a "twisted " shape to it and was definitely seated into the base of the bullet.
There is a part of the bullet base that is corroded and eaten away.
The powder is standard stick shaped granules and is in fairly good condition.
I don’t know how else to describe this bullet. I took a photo but it may not show enough detail for you.
What the heck is it? Probably something very common and ordinary but I don’t have a clue.