Heavy crimps.........

With my RCBS dies loading .357 magnum with a 125gr Hornady XTP bullet #3573 and a OAL of 1.59 with my cases...

my #3 die setting the depth of the bullet for a roll crimp has its center pin at.........

1.13" for a light crimp and
1.12" pin sticking out of the die for a heavy crimp.

OAL of the pin can be set by/on any part/surface of your die, that
you can get a good reading from.

This is how I set my crimps, with my dies.

Good loading.