This photo shows the rear flange just breaking its seal. Lucky timing. This is one of the Accumatch-1 pellets.
Nikon Coolpix 995 Sunpak 611 set on auto and blowing its light directly into its sensor which was covered with a cleaning patch. Flash distance about 4". f7.0 aperture. ASA 400. Sound trigger about 11" from muzzle.
full exif