1. Why do many foreign military sniper rifles use 7.62 bullets instead of the lighter, more accurate 5.56 round?
2. What is the difference between rounds such as 7.62×51, 7.62×54, 303… ect. I just want to know what the differences are, no matter how small. Also differences b/w the 5.56 rounds/.223 ect
3. .223 is the same thing as 5.56, right? just like .303 is same as 7.62?
4. Is the recoil of a .45 the same as .357mag? which is bigger if not equal?