I never said speed isn't important? You seeing things?

I think you need to brush up on your physics. Velocity and Energy don't go hand in hand. Just because a projectile flys faster does not mean it is carrying more energy and vice versa. Just because a projectile is carrying more energy doesn't mean it flys faster. There are loads of other factors. And if you want to go down that route. Perfect example of that type of physics, is the balistics of guns.....