You still have to shoot at known distances to figure out POI. Doesn't matter how fast your bullet is going if you don't practice at comfortable distances, you wont know where it is going to hit, even with a chronograph.
If you can't see the Flaw in that Slaw, you won't be able to think your way out of a paper bag !
Knowing the velocity eliminates a lot of guessing and saves components.
I'm not going any farther.
Jerry
