Originally Posted by BountyHunter
Generally, your teck tension will vary greatly. Your groups will open up big time.
Anneal it or throw it away. Only two choices.
If you were using inline dies to seat with a KM press with dial indicator, you could measure the difference in seating force.
Not true... you have been given information by someone that doesn't know what they are talking about.
Ol' BH likes to give opinions about things he knows nothing about.
I hope you didn't throw away your cases.
First, ALL case makers anneal the shoulders, or they wouldn't be able to form the cases.
Lapua (and the military) does not polish the cases after annealing, our domestic makers (and most foreign makers) do.
Shoulders do not work harden (since they do not do any work ;) )... and the amount of bumping the shoulder does or does NOT do...
... has nothing to do with neck hardness, or annealing. They are two totally unrelated issues.
The only time you can work harden shoulders is when you are forming wildcats and moving shoulders back with form dies, and even then, "hardening" is rare.
The reason that your cases don't "seem" to bump, is because chambers and dies have an allowable tolerance - it's the ol' +/- 0.00xx thing.
In your case, you have a chamber that is on the short side of the allowable tolerance, and a bump die that is on the long side. So the die is not capable of bringing the case down that last few thou that you need.
There is probably just a few thou difference... and a few strokes of the press can make them fit ("multi-bumps").
If you cannot get the cases to fit, the die maker will adjust the die for free.
As too annealing - there is no reason to throw out brass even if the shoulder is hard - it anneals just fine - all brass is annealed at the shoulder to start with.
And lastly... ballistically, brass that fits the chamber tightly is more ballistically uniform, than brass that is loose in the chamber.
None of it has anything to do with necks or neck hardness, or annealing necks.