Typically best practices from the competitive shooting side have agreed that in order to learn to shoot fast, you need to shoot fast. Not so fast/outside your comfort level that you’re hitting consistently only mikes, no shoots, or similar, but if you’re shooting 1-2 rounds a second at 10 yards static or something that’s not gonna to teach you how to process and shoot faster. You need to practice at an uncomfortable level, slightly above match pace to see how and where the wheels fall off in training.Why is that FUDD? You go slower until you build your muscle memory and smoothness, then you can start doing it faster. Just like motorcycle racing. You don’t start out fast you’ll just crash and die
So, continuing to shoot slowly and expecting that it translates well to when you’re shooting 4-5 times a second instead is usually flawed thinking.
Not to mention the habits you build and the fundamentals that might lead to acceptable results at closer distances (like 7-10 versus 15-25 yards), lower accuracy standards (just near center mass is different than head box or all A zone hits within a fist sized grouping), or at a slower pace change drastically/may not be serviceable anymore when the targets/shooter isn’t static, you’re having to transition between targets or at varying distances, etc. Once you speed up, make it more difficult through other factors or things like that every flaw is amplified - support hand grip that didn’t matter for single shot strings won’t work towards the end of the bill drill, shooting hand sympathetic movement might introduce unwanted input at speed, you might over or under return the gun, your index might be slightly off when presenting, you run into trigger freeze because you’re used to prep and pressing.
The list goes on and on.


