After resizing my brass on a 6.5 cm i see a flare on the mouth. The length is coming out to 1.912-1.916. Im trimming them back to 1.910 and taking off the flare. My question is where is the flare coming from? Is it in the chamber and my brass is too long, or am i building it with the die?
Case mouth flare
- Thread starter Forward543
- Start date
Case mouth flare is usually(not always) a result of constriction too much at once, what dia do fired necks measure compared to sized?
Hornady dies, and it seems like the flare gets worse the more i use the case. On 5th firing. Ill look to does not seem to be coming from the die.
You might want to consider annealing your brass prior to the time you get to the fifth firing. For that matter, you might want to anneal right now prior to any more resizing and see if that has a positive effect for you.
I don't think annealing brass will do anything to stop flaring, I think the softer the brass is the better chance for a flare. He needs to find out what is causing this, and truthfully getting a different die and a few pcs of new brass is a good start.
That seems a short cycle. Were you running into work hardening after the second firing?
Hopefully you haven't sofetened the brass by over heating when annealing. Someone suggested starting with new unfired brass. That seems like a good approach.
