Quote:
Originally Posted by Hoser
Older SSK chambers are a touch on the tight side and may require neck turning for chopped 223 brass to work.
However if you think you have a 300 Whisper chamber designed to work with cut down 223 brass, go ahead and use Redding 300/221 (aka Whisper) dies.
If this gun has not been built yet, ask your gunsmith *exactly* what case length you should trim to. If he says 1.350-1.400 than you have a Whisper chamber and you can use Whisper dies.
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That's the answer, I just didn't know how to ask the question. He builds .300 Whisper rifles designed to use cut down .223 brass just for the reason you described. Thanks!
Paul
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