MagnumManiac
Well-Known Member
I am a smith, all of my brass is fireformed from Winchester White/Yellow box, annealed, sized and with custom Redding dies. The brass never splits when first fired and formed, but does on the third firing about 70% of the time.I'm not a gun smith, so I can't say what would cause that. I make all my brass out of 7mm mauser. I fire form using full powered AI load specs and have never had a brass failure. I do use the slowest powders and with my 26 barrel it approaches the speed of 25-06 on the chrono
I had 300 pieces of that Winchester brass, all had been fireformed and I have lost 70% due to weird neck splits.
They are in the middle of the brass neck with short longitudinal splits and tiny horizontal splits coming off the main split. Some cases have them all the way around the neck, like 3-4, others have only 1.
It's almost like the brass is brittle, but it has been annealed after every single firing.
I fired some factory Remington brass in the rifle and the necks expand by .006". This is not excessive, haven't fired the Rem brass again, was just seeing if it is a gun problem or not.
Cheers.