please delete

[JKEEN33]

Xx

[JimmyHoffa]

you don't have to crimp and can seat to any depth you like.

[JimmyHoffa]

If you were to crimp with a roll crimp, you would seat to the cannelure.

Also, if you use hornady charge weights for the cannelured bullets, they are set for that seating depth.  So if you seat deeper you get a compressed load-higher initial pressure.  If you don't seat as deep, but have little room to the lands, you can get a pressure surge.

[high country]

Agreed.  Don't sweat it.

[fastdam]

I would ignore the cennelure unless you decide to use it. I would personally try some test loads using the cannelure with a crimp just to see if the results are desireable or not.

[Blacktail Sniper]

I would ignore the cennelure unless you decide to use it. I would personally try some test loads using the cannelure with a crimp just to see if the results are desireable or not.

  And I would add, at a reduced load until you know what changes in pressure crimping to the cannelure adds.

[Heredoggydoggy]

You don't have to use the cannelure.  Most military rounds are crimped into the cannelure for reliability reasons, and the bullets are designed for this purpose.  A test showed that most guns don't care how deep a bullet is seated, and in some cases, bullets seated further back from the bore were more accurate.  Finding what your gun likes is the fun!  (for me, anyway). 

[mazama]

In 40yrs of reloading I can't remember ever crimping a rifle round.

[Biggerhammer]

I've killed allot of animals with the cannelar hanging way out of the case. 

[Heredoggydoggy]

In 40yrs of reloading I can't remember ever crimping a rifle round.

50 years for me.  I might have crimped my 30-30 rounds--I can't remember!