Molded lead oddity - rifle related?

[kyphote]

No clue on this, thanks...

 

[l.cutler]

Appears to be the glob of lead that was on top of the bullet mold when the sprue was cut. The round spot is where it went down into the mold.

 

[DirtyMike]

Melted bullet

 

[Charlie P. (NY)]

I go with the sprue explanation. I cast lead bullets and that sure looks like what you get when pouring the lead in the mold. Have to have a little extra because as lead cools it contracts and without the sprue it will suck air into the cavity.

 

[vayank54]

Yep, bullet sprue