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Old 08-07-2014, 05:42 PM
pmulcahy11b's Avatar
pmulcahy11b pmulcahy11b is offline
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Join Date: Sep 2008
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That's a really tight tolerance you'd have to have.

Actual dimensions of a 5.56x45mm round: 5.69x44.7mm

For 5.45mm: 5.61x39.65mm

You have a bit less than 0.08mm to work with...
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