357 max to fit in mag chamber??

[GP100man]

i have a project on the subject of shotshells & trying to size 357max brass to fit in my mag cyls , i`ve sized em in a 358 boolit sizer die but they spring back to 3605 or just a tad too big .
i thought about annealing to make em softer , also sizing in a lee 356 die , for 13$ thats a cheap fix , just wondering if anyone has done this & what you used to neck the max brass down with.
more shot = deader snake!!!!

GP100man:cbpour:
:castmine:

[Scrounger]

Just a weird thought...(What else would you expect from me?) In Europe and Australia they have a cartridge called the .222 Rimmed, or maybe they say 'Flanged'. I haven't checked the dimensions but I wonder if they could be blown out to form cases the way you want. I remember some gun writer in the late 60s was cutting of .223 cases to make stronger .38 Super brass, so there is some close relationship in sizes...

[Willbird]

It looks like a 218 Bee die might do the trick.

http://stevespages.com/jpg/cd218bee.jpg

30 carbine MIGHT work for you too

http://stevespages.com/jpg/cd30m1carbine.jpg

a 25/20

http://stevespages.com/jpg/cd2520winchester.jpg

or a 32/20 is worth a shot too

http://stevespages.com/jpg/cd3220winchester.jpg

[longhorn]

Midway lists .222 Rimmed brass. The guy trimming down the .223 to make strong "Super 9" brass was some Marine named Cooper, I believe. .357 ballistics out of his beloved 1911.

[GP100man]

dang it all i just traded a set of 222 dies for a 25-06 dies, oh well ???
summtin will turn up sooner or later .
gentlemen , i thank you for the info on fire forming some brass , have`nt explored that aspect of my project!!

GP100man :cbpour:

[357maximum]

standard 222rem , 221 fireball(adjusted properly) , should get you what you want.........anneal the brass well first...or.......TINK.....she will split