As a note after a summer season of firing 20 x S&B 303 brass and the same 20 x 1943 brass, I have not yet had a S&B brass case fail, but I have had 5 x 1943 brass failures. I also had 20 Winchester brass which I shot about 1/3rd as frequently and 4 failures though that was while resizing them, the neck's collapsed like they were very soft brass.
This summer I intend to shoot privy and Winchester on the range and the above at WSRA.
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