Well I tried to anneal the necks of the 6.5x55 again without quenching. I got the same results 6 out of the dozen lasted 3 reloads the other 6 only lasted twice. So I think I got a bad batch brass

Could very well be I have seen bad batches before.

You haven't mentioned it but have you tried other brands of brass in your 6.5?

Have you checked the neck portion of the chamber to make sure its not oversized/out of spec? i.e. making a chamber cast.

No I have not tried another brand of brass. I'm Going to a Gun show maybe I can pick up a couple different kinds of brass. No I have not checked the the neck portion of the chamber,our local gunsmiths here send every thing out except minor things. Plus I do not trust them. I'm not familiar with making a chamber cast. I have heard about making chamber cast,Do not know how it is done.

Thank you for the imp[uts.

I have some fired Lapua I would be willing to mail you to try? I can anneal it with AMP machine before sending. PM me if you want me to send you some with your address. We have great luck with it in our swedes.

Chamber casting:
https://www.youtube.com/watch?v=KgRp3r9VPE0

When do they split?

While loading, or shooting?

IF shooting, check your chambers neck size.

Might be too tight.

Are you necking them to a larger caliber?

IF just reloading, likely bad brass.

Let us know what you learn when it's cured.

George

Annealing will not fix brass damaged by chemicals.

candle flame to anneal brass.


Made a sponge donut about 3/8" thick & 1 3/4" round. Wet sponge with water. Keep case neck/shoulder low in the flame.

Heat case while rotating 180 . When you hear water boiling, anneal is done.

243 win brass, about 30 seconds or till water sizzles. Any less time and brass in just stress relieved. Temperature + Time = Annealed.

I have played with the candle annealing . The test batch didnt come apart. But if using a bushing die, i dont need to anneal.

See Post #4 Link

Standard FL dies can and do overwork the neck area.
The fix is a Redding Type S FL sizing bushing die. Dont forget to measure a loaded rounds OD. Get a bushing .002" smaller, to start.