Why test velocity on target guns?

[Doom2]

It occurs to me that the most important thing when target shooting is accuracy, not velocity.

We know that most guns will achieve maximum accuracy when using cartridges charged with something less than maximum powder charge.

If this is the case, does velocity matter?

Is testing velocity necessary for prediction of accuracy?

Great question! And some great answers. Actually, velocity, distance, standard deviation, wind, cartridge, ... are all interrelated and the importance of each is dependent on others. Brian Litz put together a system nicknamed WEZ that actually puts this all together. The following link is a paper he wrote that describes the concept.

https://appliedballisticsllc.com/wp-content/uploads/2021/06/Weapon-Employment-Zone-Analysis.pdf