410 brass cases

ht tps://bilozir.net/ often carries Magtech brass shotgun cases.

I've been lead to believe that 303 cases can be blown out to work also but haven't tried it.
I see they are in Canada but are sold out

9.3x74R are better to be blown into 410
the rim thickness is smaller than that of 303 cases and closer to 410 spec
I also want the case to say 410 on it
 
Magtech makes it.
I have made some before.
303B can be blown out, but also need the rim thinned to go in battery. They'll need a band added around the web area and slightly forward of web, as the 303B is smaller, this holds the case centered.
However, buying 8x57r is easiest, but more expensive. (Since I have ???? 1-F 303B brass, plus 1500 virgin brass). The 8x57 just needs blown out . I use some old Nobel shotgun powder under corn meal and waxed over, fired in the 410.
 
Just want a few loaded up for bedside protection ;)
 

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