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Posted: 4/26/2013 1:14:33 PM EDT
For example, can you notice the difference in loudness between 55gr and 62gr?
Link Posted: 4/26/2013 1:15:17 PM EDT
There are a lot of factors.  Least of which is probably bullet weight
Link Posted: 4/26/2013 1:17:57 PM EDT
Not really

noise is more dependent on chamber pressure



now 5.56 is normally noticeably louder than 223 in the same bullet weights because of higher operating pressure


 
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