Jordan Whyte
Jordan Whyte thanked
The question would need to be more specific.  The answer would be different if the question was:   "What is the fastest bullet from mass produced ammo"   vs.  "What is the fastest bullet fired from a rife, those custom loaded included"
Jordan Whyte
Jordan Whyte answered sohami shrihARI's question

Yikes, there is a lot of misinformation here!!

.220 swift is the fastest commercially made cartridge in existence as of Sept. 2013.  1.3 km/sec or 4400fps at a constant measured velocity.

The .22-250 can also achieve similar results - 4250 fps

•• it is possible to get both cartridges to push bullets at 4700 fps but at … Read more