Seating a Bullet With a Cannelure

[powerspc]

I was going to post this in the Stupid Marksmanship section but here goes;
When seating a bullet with a cannelure, in this case a Hornady .30 cal. 150gr. SP Interlock in a .300 Win Mag bolt gun:

• Is crimping required? [My understanding is the cannelure is there to lock the jacket and the core together and has nothing to do with crimping?]
• Do you need to seat the bullet to the cannelure? [To the cannelure puts me .060 off lands, .020 off the lands puts the case neck below the cannelure]

Thanks as always!

P.s. Not brand new to reloading, have just never worked with a cannelure bullet before.

 

[mudpig]

Reload them as if the cannelure was not there. Won't hurt a thing.

 

[powerspc]

Excellent. So, was my assumption correct, i.e., that the cannelure is there primarily (exclusively?) to lock the jacket to the core and has nothing to do with crimping?

 

[spife7980]

Ignore the canelure and load to what your barrel shoots best unless you’re trying to make super tough military type ammo not geared toward accuracy in one particular rifle.


The cannelure is there so that the crimp has a place to go without disrupting the jacket. Too much crimp can lead to deforming the jacket and internal core, lack of a cannelure when crimping only increases the risk that you squeeze the bullet too much. That’s why most say if you must crimp then to crimp lightly.

Not sure how the lack of solid contact with the cannelure could somehow lock the case and bullet together on its own...

 

[mudpig]

Canelure only gives you room to crimp if you want to. It does not lock the core and jacket. You might be thinking of an interlock ring.....those rings are on the inside of the jacket.

 

[powerspc]

Appreciate the quick responses and solid answers!

P.s. Yes, I was confusing the interlock ring with the cannelure!