Knob Creek '13: 20mm, .50BMG tracers, 37mm grenades
by
Chris Cheng
Published: October 13th, 2013
20mm Vulcan round.
.50BMG Ball, Armor Piercing, Armor Piercing Incendiary, Armor Piercing Incendiary Tracer, and regular tracer rounds.
37mm smoke grenades, and other varieties.
Chris Cheng is History Channel's Top Shot Season 4 champion and author of "Shoot to Win," a book for beginning shooters. A self-taught amateur turned pro through his Top Shot win, Cheng very much still considers himself an amateur who parachuted into this new career. He is a professional marksman for Bass Pro Shops who shares his thoughts and experiences from the perspective of a newbie to the shooting community. He resides in San Francisco, CA and works in Silicon Valley.www.TopShotChris.com.
More by Chris Cheng
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the one on the left in the second pic looks like a 30mm to me.
Yep, looks just like a 30mm practice round for the GAU-8 Avenger, which mounts in the A-10 Thunderbolt II.