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Old January 3, 2021, 05:55 PM   #12
1911_Hardball
Senior Member
 
Join Date: September 25, 2009
Location: SD
Posts: 198
Your data excludes powder volume. There's a lot more powder in a .357 than a 9mm.
Pressure is irrelevant. If higher pressure meant more noise .22LR would be louder than .38 Spl or .45 ACP
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