Unless it is a rifle with substantial recoil. The rounds held in the magazine take quite a battering and can drive the bullet deeper into the case if they are not crimped.

I crimp on all cartridges with recoil equal to or greater than .375 H&H.

I also crimp .22 Hornet cartridges, but that is for consistent ignition only. The Hornet has such a thin case that it does not hold the bullet consistently. It has been my experience that crimping is the key to accuracy with the old Hornet.