Hydro Forming and Annealing

[Jtate]

I have a bunch ( 1000) of once fired 6br brass that I want to convert to Dasher. What is the correct procedure, anneal 1st then hydro form, or hydro form 1st then anneal ?

 

[DHuffman]

I would anneal before and after so both the hydoform and fire form have a soft shoulder to work with.

 

[Webster]

I have a bunch ( 1000) of once fired 6br brass that I want to convert to Dasher. What is the correct procedure, anneal 1st then hydro form, or hydro form 1st then anneal ?

Always wondered if annealing might have an accumulative effect. There is a big assumption that you are always returning to the same hardness?

 

[Webster]

That is the whole point of annealing, to eliminate the cumulative impact of brass hardening. Its like doing a reset for your brass. It returns it to the same hardness every time so that you get more consistent sizing, neck tension and therefore bullet release.

You may benefit from reading the paper that Damon Cali, a member here, wrote. See pdf below.

Joe

the article has nothing to do with repeated anneling and work hardening to see if you return to the same hardness.

 

[Shinbone]

If repeated annealing doesn't get the case back to the same hardness, what will you do, instead?

 

[Webster]

If repeated annealing doesn't get the case back to the same hardness, what will you do, instead?

I went to the AMPS website. They had exactlly the info I was looking for. Sizing, shooting and annealing the same case 5 times. Hardness testing 15 times. The case returned to extremely close to the original hardness each time. I assume it isn't copywrited to post. It shows the great work they do. Good advertizing.