Crimp on the cannelure as you have done.
COL given is a maximum so provided it is no longer then you are good to go.
Bullet styles (RNFP/SWC/WC/RN/TC) will affect COL of the finished product but provided your rounds are no longer than the published COL then that'll be fine
It is possible to set the bullet longer (up to COL) but this will mean crimping on the bullet body and so to prevent the bullet backing into the case a firmer crimp is needed. In my experience this leads to inconsistent crimp tension which will give inconsistent breech pressures and greater variability of Mv. It will also work the case neck more and shorten their life.
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