Originally Posted by rickt300
That sucks, I have necked up 40 or so cases of 243 to 260 and have yet to see anything resembling a problem.


As mathman noted, it doesn't always occur, but can after a number of firing/sizing cycles. Which is why I eventually started necking .270 cases down for my 6.5-06, rather than necking .25-06 cases up.

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