Here's a first

[Redmt]

At least it's a first for me. I'm loading final loads for depth seating and my final # is 2.735. I use a light roll crimp just to snug it up a little. The roll happens to hit one of the cannelures right at the edge and squirts the bullet out about .015. it took a while to figure that one out as they weren't grouping as expected.

 

[std7mag]

More information needed!

What cartridge?
What bullet?

Does it even need a crimp?
I'm shooting 7mm WBY Mag without a crimp.
Friend shooting 300 Win Mag without a crimp.

45-70 I do a light roll crimp, but my bullets are not cannelured.