+1 on no crimp for non-cannelured bullets. You should have sufficient neck tension to hold the bullet firmly enough for single loading or bolt action applications.
The only reason I would crimp this round is if I A. had a cannelured bullet and B. was shooting it through an auto loader like a BAR.
In life, strive to take the high road....It offers a better field of fire.
"Robo is right" Fuzzball