My "super-duper" .410 load is slow, at around 1150 fps. Exactly where I wanted it to be. It carries 3/4 oz. of true nickel plated shot. I have dishragged doves with it at a measured 40+ yards. DITA (dead in the air).
I normally try to keep my shots at 35 yards or less, even with that excellent load. But, I make mistakes occasionally. I have made a few 45 yard kills with it. Armchair experts would say that such a load shouldn't pattern well. They'd be wrong.
IMO, lower velocity does not hurt long range gunning at all. On the contrary, I believe it helps.
I also believe a gunner is better off shooting every thing he shoots at nearly the same velocity, whatever that may be.