Here is a link to illustrate the relative lack of effectiveness of the 5.7 x 28mm round.
http://lightfighter.net/eve/forums/a...3621062102/p/1
I would submit that instead of saboting a necked down 9mm round, why not just saboting a regular 9mm round and retaining the original barrel diameter? There is significant hype involving effectiveness of the PDW rounds on soft targets, but I'm not convinced.
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