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@AviationJeremy @mmpadellan @johncusack Longer barrel, less GSR. SCIENCE! https://t.co/E2mNWGG4tz
@AviationJeremy @mmpadellan @johncusack Longer barrel, less GSR. SCIENCE! https://t.co/E2mNWGG4tz
The effect of type of firearm and shooting distance on pattern distribution, particle dispersion and amount of gunshot residue - https://t.co/iqLDFWO3J5