neck will not tighten around the bullet

[tysn]

what is causing this, i am a bit of a novice but the 1st 20 i reloaded the neck crimped around the bullet, but the first one i tried the bullet fell to the power level of the case, i didnt resize it to 30 cal lol

 

[tysn]

would my using the deburring tool on the brass have anything to do with that?

 

[MagnumManiac]

What type of sizing die are you using?
Have you actually sized the cases?

The chamfering tool has nothing to do with neck tension, it's only needed to give a slight bevel on the inside/outside of the case mouth on new brass and after trimming.

More info on what you have/haven't done is needed to answer your question correctly.

Cheers.
gun)