As the above chart indicates, bullet velocity among popular centerfire calibers ranges from 2450 to 3250 fps, which is 75 to 100 percent of the AR's speed. (The only exception is the .300 Blackout ...

There are several variants of the heavy-hitting .50 caliber round, used by the U.S. military in M2 machine guns and M107 sniper rifles. The .50 caliber M8 armor-piercing bullet has an aluminum ...

Still, any .37-caliber pushing 250- to 300-grain bullets faster than about 2,500 fps is going to lead to copious amounts of skinning and packing. Ditto the .416s, 44s, and 45s. How to Choose the Best ...

The .38 Spl. and the .357 Mag. shoot the same caliber bullet, but the .357 Mag. pushes it much faster and has a much better record for stopping bad guys.