Forum: 300 Whisper Ammo and Reloading
12-19-2010, 12:20 PM
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Replies: 20
Views: 4,254
300 BLK Compatibility w/300-221 Question
I know the general answer is there is no definite answer because there has never been an official specification for 300-221 and a ton of different manufacturers have been cutting the chambers.
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