I do like the collet bullet pullers for this reason: There is a wealth of very inexpensive military surplus ammo out there. Much of this ammo will not shoot well for one reason or the other. I can pull a bunch of bullets, reduce the loads a bit and while doing that, make the loads more uniform and then, reseat the bullet to an OAL that suits my rifle. The resulting cartridges are very fine range burning ammo that groups close to match grade accuracy.