>>64027514
Space Marines use .7 and .75 in rifles and pistols, .998 (and smaller than the smallest .998 you have there) in heavy weapons, humans use .5 - this is extremely well established over multiple decades of lore and books. The picture you just posted was made up by someone on Space Battles to try to win an argument, and I hate all of you 40k retards for slurping shit like that up.