![]() willow tree, Willow Tree Shrub, tree, grass, biome, willow png 1024x1024px 1.53MB.yellow and red flame art, Light Flame Fire Explosion, particles, orange, particle, combustion png 1024x1012px 767.57KB.emergency light, Alarm device Security alarm Light Euclidean, Red alarm, electronics, text, web Button png 3031x3220px 90.89KB.Yellow Material, Fireworks stick, computer, triangle, computer Wallpaper png 510x524px 27.18KB.orange fire illustration, Fire Smoke, Fire, image File Formats, orange, computer Wallpaper png 711x1225px 759.24KB.Muzzle flash Desktop, Tank, effect, leaf, orange png 700x400px 301.42KB.Muzzle brake AK-47 Flash suppressor Blank-firing adaptor AK-74, muzzle flash, angle, aK47, ak 47 png 500x500px 125.38KB.Emergency Lighting Siren Emergency vehicle lighting, light, orange, ambulance, light png 512x512px 119.15KB.Fire, Fire, image File Formats, orange, computer Wallpaper png 711x1225px 206.19KB.flame illustration, Fire, Fire, orange, like, lip png 972x1041px 283.42KB.orange flamed letter E illustration, Letter Alphabet Fire Smoke Flame, fire, text, orange, candle png 550x550px 114.27KB.blue flame illustration, Fire, Beautiful Blue Fire, texture, blue, image File Formats png 1375x727px 1.51MB.Flame, Embers, Fire, Flashes, Hot, Burn, Campfire, Wood, Heat, Brand, png 960x1280px 1.21MB.blue flame digital illustration, Fire, Blue Fire, blue, image File Formats, text png 1350x728px 1.49MB.Flashing Lights, Police Fire EMS Emergency medical services Fire department Simulation Video Game, Police, game, emblem, label png 1024x1024px 934.64KB.ABC Preschool Free Alphabet song PreSchool Kids ABC Flash Cards Pre-school Education, fire letter, game, child, text png 512x512px 147.41KB.Flash, Fire, Explosion, Energy, Pain, Power, Head, Current, Mentally, Psychic, png 1280x720px 377.46KB.Vulpix Flash fire Ninetales Drawing, fire, orange, fox, pokemon png 857x800px 1021.39KB.Light Muzzle flash Fire Flame, gun fire, orange, flame, bocacha png 512x512px 6.95KB.fire explosion, Muzzle flash Desktop, background flashing, orange, computer Wallpaper, gun png 720x576px 19.96KB.And given the staggering numbers of rounds produced per year, you're going to get quite a few of them that slip past QC. ![]() The rounds are produced in the hundreds of thousands, if not millions per year, and the machines that fill the case with powder typically operate by weight, which means you can get inexact amounts of propellant per case. It's also just a core thing of the manufacturing process involved. If all 66~67 rounds produced a flash then statistically speaking there would be way more photographs of said flash than there are in actuality. An M61 fires 66~67 rounds per second on the low end. Now consider that most strafing events are photographed with shutter speeds around 1/500 or 1/1000, sometimes capturing the round in-flight. You're going to have a mixed bag of effeciently packed rounds and inefficiently packed rounds. The flash is caused by unburned powder, which is going to be caused by either a barrel not long enough to burn all the powder or an ineffeciency in a round's charge. Another thing to factor in is that while there sometimes is a flash, it is not going to be on every single shot.
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