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Hi all quite new to reloading so you will have to patient with me.
i have reloaded some factory round ppu brass and after one reload most of the cases have tiny splits around the top of the cases.
i have some Winchester brass and i have reloaded this 6 times and its fine.
the one thing i have noticed is that the factory ppu brass has some strange crimp type marks where the splits have appeared .
was going to attach photo but cant see to do it for some reason ?
please advise. wtfwtf

Suggest that you anneal the brass.

Was the brass, both Winchester and PPU, bought second hand/new or fired factory by yourself?

dromia wrote:Suggest that you anneal the brass.

Was the brass, both Winchester and PPU, bought second hand/new or fired factory by yourself?

all brass was new , the Winchester was in bags of 100 and the PPU was factory rounds.
how do i post a picture ?

See here for attaching images:

http://www.full-bore.co.uk/viewtopic.php?f=17&t=10130

If the brass is from new then you would be best placed to know the cause of any crimp marks.

Is all the brass trimmed to the same length?

see photo for details of brass

Looks like a very hard crimp guaranteed to work harden brass unless annealed.

Is it a Lee factory crimp die you are using?

If so it is a brutal tool and should be used sparingly.

What about case length?

Any reason why you don't shoot cast boolits?

They take a gentler roll crimp.

dromia wrote:Looks like a very hard crimp guaranteed to work harden brass unless annealed.

Is it a Lee factory crimp die you are using?

If so it is a brutal tool and should be used sparingly.

What about case length?

Any reason why you don't shoot cast boolits?

They take a gentler roll crimp.

sorry i did not crimp that round it is a factory crimp ppu round.
the case on the left is the result after the first reload of the factory round.

the cartridge on the right is one of my hand loads using Winchester brass. (fired six times)
the case on the left is a twice fired factory ppu .spot the difference !

Damn! I have cases split on me all the time now but that is because my brass has been reloaded an unknown number of times as it was secondhand when I got it.

As Dromia says, use a very light crimp. As long as it holds the boolit in place in a tube magazine and can stand the pressure during loading then that's really all you need.

What powder charge are you using?

Mike357 wrote:Damn! I have cases split on me all the time now but that is because my brass has been reloaded an unknown number of times as it was secondhand when I got it.

As Dromia says, use a very light crimp. As long as it holds the boolit in place in a tube magazine and can stand the pressure during loading then that's really all you need.

What powder charge are you using?

i think my crimp is light, the powder charge at the moment is 9.2 grains of unique 240 cast bullet
tried all manor of variations from 6 grains up to 11.8 and this seems the most accurate.