Re: How do I get my extreme deviation or spread DOWN?
The reason I ask is because I've apparently never hardened necks, and never have to anneal beyond initial.
Frequent annealing seems to me a bandaid I don't need.
I measure seating forces with an electronic loadcell and hardened mandrel. I measure every single neck just before bullet seating.
With my control/consistency in reloading, I can see any change in brass hardness. Yet with many many reloads of my cases I don't see it change. And I've never had to pitch brass.
My velocities, ES, and tune hold without annealing.
If you find that annealing improves anything, then you must be work hardening brass through excess sizing. Maybe you don't have any choice(or the choices were already made).
But annealing reduces neck tension on properly expanded necks(due to decreased springback). This may lead to heading for more sizing than needed(if not annealed), working the brass more, and self perpetuating a need for the cause..
People who don't expand necks think annealing increases tension, again because of reduced springback. But it's really only increasing seating forces, which increases seating variances. Annealed tension(grip) is actually less than non annealed necks provide when sized correctly.
Like reducing runout, it's better to avoid the causes, so I don't recommend bandaids.