A lot of shooters swear by annealing and a lot swear after annealing.
I'm in agreement with GB on this. I shoot these black powder cartridge rifles most likely more then most shooters.
I use up by average 4 cases a year, usually more.
My compedetive shooting is pretty much over because I just cant see that fine line any more, but I still go to a few 1000 yard gong shoots and Buffalo shoots every year.
The only time any more that I anneal a case is when I take basic brass and form a neck, even with a slight neck forming say from a .45-70 case to a .40-65 .45 to .40 bottle neck cases this is the time to anneal a case.
I use Starline for the .45-90 and .50-90. The 400 cases I have for each have never been annealed since Starline have had them on the market.
Are they hard? yes, they are a little harder then the Rem, Win, but not as hard as Norma .45 basis brass is and I use that also with out annealing.
When I prep my brass for loading I just neck size and my expander ball is just large enough in diameter to put enough neck tension on the bullet to hold it, in my case .002, I can still spin the bullet with my fingers.
A lot of match shooters will anneal after every shot, and so did I because they did it, well after many comparisons I stopped because I could not see a spit difference in my groups down range on the paper.
I had more cases pull the necks and had to be trimmed after the second or third loading and we all know what that does to the brass side walls.
Anneal if you choose too but dont say that a certain brass needs to be annealed.
The wall thickness will still vary your extreme spread in velocity even if you anneal, your better off turning the case necks down then annealing the brass to get uniform bullet release.
LP