I used the Lee 7MM Mag neck die on the 280Ack Emp brass and it seems to work .I have not fired them yet, might also work on the 280 Rem . some feed back if anyone tryed this. Target
Never tried it, but as long as the neck die will size the neck to appropriate dimension without altering the body or the shoulders, there is no reason you can't use it. Give it a try and see.
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