Quote Originally Posted by SideShow Bob View Post
You can?t mix metric & SAE. So that would be 1,371 MPS. The conversion factor is M X 3.281 = Feet. So, 1,371 x 3.281 = 4498.031 FPS.
At about the second shot, your barrel is spitting out molten Copper & lead.......

Hopefully you aren’t shooting tracers.......
Wait...you still have SAE in there with the 18 INCH barrel length?