Condottiere said:
You have to shrink the warhead to four milliemtres from ten.
Unless you use a larger, slower round.
I probably have read too much "Stainless Steel Rat". I like all flavors of Gauss weapons, and big Recoilless Pistols.
It seems reasonable that you could scale a "Gauss" weapon up to a sizeable bore, shotgun sized doesn't seem entirely unreasonable, and with a variable velocity, computer controlled Gauss "launcher", you could place various munitions at precise locations within several hundred meters.
We have rifle/scope combo's now that let you mark a target at extreme ranges and manage the firing when the barrel is properly aligned for pinpoint accuracy.
https://www.tracking-point.com/
Interface that with a HUD in your combat helmet, and appropriate software in your computer weave, or weapon, warheads that communicate things like mass, cross-section, and aerodynamic profile to the weapon, and you've got a weapon system that provides unparalleled flexibility. Due to the ability to adjust the muzzle velocity for each shot, perhaps even putting some "english" on the round by adjusting spin, automatic calculation of, and adjustments for. atmospheric conditions, elevations, and rotating reference frames (planetary rotation, and inside rotating space stations, or other scenarios) you can use the weapon in both direct, and indirect, fire scenarios with frightening accuracy.
Like the US Military's new SAW, you can have your shrapnel producing warhead fly 200 meters, clear the window frame by 3 feet, then explode, affecting the two shooters ducking inside a window in a distant building. The difference is that you can now arc your round in, or use a smart round, launch it to 1000m altitude, then let it find its target from there without exposing yourself, or your position.