Quote:
Originally Posted by bagekko
Quite a bit of difference, probably since there really isn't any sub 5.56 rounds. First time I shot them together it was hot 5.56 rounds that really didn't sound much suppressed and the 300BLK was significantly quieter but I might of been using 240g. Second time was using 75gr Hornady black in the 5.56 and sub 300 rounds and still a difference. I really need to do some more comparisons with all my different 300 sub rounds as there's a wide range of grains 180-220+. with the heavier weights I think there could be up to a 10db difference.
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10 is noticeable. I run 55gr 5.56. rarely some 62gr. Just regular stuff like PMC Bronze, Winchester, Federal AE etc