Most factory loads are crimped. Most bench rest shooters do not crimp. I think I would try it both ways and find out what works best. Not matter which way you go, proper neck tension is very important. personally I do not crimp most of my loads. I find very good accuracy without crimping. There are exceptions, like mentioned above, I crimp straight walled cartridges, no matter if they are being shot in a lever action, pistol or a single shot. I also get better results in 22 hornets with a crimp. I rarely crimp higher pressure rounds. There are many who do crimp every round they do and there are lots that do not crimp. It comes down to personal experience and results that you find. I personally would not crimp and see if you get the results you are looking for, if not try crimping. Good Luck and Good Shooting.