Tumbling large and small brass together.

[FnSpr1akid]

Oops had to pick the grains out of the neck to get em apart. Found two in one lol. 300 blk out and 416 Ruger.

 

[RT2506]

I learned a long time ago to not tumble cases together than can one can fit into the other. Pain to get apart and some you can't. I found this by tumbling 9mm with 40 or 45 cal pistol cases mostly.

 

[FnSpr1akid]

I found out the bottle neck makes it worse lol!