FINAL RENDER 
https://flic.kr/p/2kVRinAhttps://live.staticflickr.com/65535/51148864352_b1e1aa5b72_o.png(image larger than 5 MB)
20MM VULCAN CANON ROUNDS-CYCLES-4K-128SAMPLES by Abhay Yadav, on Flickr
Render Without an Environment Texture in CYCLES
https://flic.kr/p/2kVYVsEhttps://live.staticflickr.com/65535/51150351534_a8437e1966_o.png(image larger than 5 MB)
20MM VULCAN ROUND-CYCLES-4K-128SAMPLES by Abhay Yadav, on Flickr
So I saw a video of this guy https://www.youtube.com/watch?v=g2U0MiZSV9A and Thought why not make a model the same as he did of a 20mm Vulcan Cannon Round!
and here it is Sketchfab
Render Without an Environment Texture in EEVEE
Behind The Scene
Also, I was able to find some 7.62mm and 5.56mm rifle rounds for real reference like the shell of the bullet, etc.(I do not own these bullets,I borrowed these from my neighbour for this project)
Hope u all have a fantastic day 
See u later!