Wow, everyone must be on vacation.
Here are some blow-throughs from my collection. This occurs when an air bubble or other weakness in the cast bullet causes the powder gases to penetrate directly through the bullet upon firing. This is most commonly found in CS Gardner bullets. Notice on the top row some specimens you don't see very often... .69 cal Raleighs (Carcanos) and a .69 French pattern triangle cavity bullet.
