If it messes with aiming, then taimat told me that it should be a thing where they decay faster if they move faster than normal instead of having different speed.
I am not quite sure what you mean...
An alternate way to the current *0.5 on movement speed to the bullets would be to make faster bullets decay faster? So we keep it like 2.2, but momentum shots decay, for example, after 2 seconds while non momentum shots decay after 3 seconds?
Doesn't sound to bad imo, but isn't that the same as capping the max range the bullet can travel? Well except that shooting behind you will make the bullets live longer than normal.
Basing it on distance seems dumb to me because it still allows a runner to spam down a hallway if they're running with their bullets, but doesn't let them attack from afar.
I don't quite get your reasoning behind that. It's just the other way around. You can still shoot a little over the screen (if that's the max distance, durr), but the main concern most people have is that you can currently shoot like 2 screens infront of you while simply holding A/D+M1. I don't see how that's supposed to be possible if your bullets only fly 450 (or something like that) px, therefore hitting people who you can't see is almost impossible, except if they walk towards you, but that can happen with any class and it's worse to walk into a pyro then into one scattergun shot.
Also I tested it with the lesser movement impact on the bullets:
+ Bullets don't travel as far with momentum shots
+ Backwards shots fly farther and don't just fall down
(+) Normal shots aren't affected
+/- Momentum shots travel roughly between 7/8 and 3/4 of the whole screen (or to be exact: the tunnel above the spawn in truefort.)
-- Bullets seem to spread more with momentum shots.
(-) Feels really unnatural to me. Subjektive??