Annealing is ideal if you can get it right and consistantly, otherwise you end up with less consistant tensions than without. Lapua anneal with electric induction where it is easy to get the temps and loc 100%.

Del, as regards crimping mate.

Folk dont crimp because they believe that it is only used to prevent bullets coming loose and keeping things waterproof in military ammunition made for automatic weapons....and to a point they would be right, however.

As I said, many have found that when loading to mag lengths, crimping has given a more consistant release pressure leading to tighter groups. I certainly improves the groups past the optiomim for non crimped loads in all of my rifles.