theunknownmuncher

I think I must have got it on sale or a very low point. Definitely was a nice upgrade! I had been non-seriously looking at 5950X or 5900XT as a sidegrade but I can't really justify that cost for something that is not a substantial upgrade, and now they seem to be totally out of stock anywhere I look. Oh well!

Its right in the first document I linked.

No, it isn't. If it was, then you could simply quote the relevant text and prove you are right. I'll wait.

posting a promotional article from the people who are selling the system

Again, completely false:

GlobalSecurity.org is NOT a private security/military company, defense contractor, or vendor. We are NOT affiliated with any such entity and we do NOT sell anything. We also do NOT buy any military equipment, machine parts, or other such items. Our website has pages describing weapon systems and other equipment but we do NOT buy or sell them.

https://www.globalsecurity.org/org/index.html

That is the theory from before they tested and found they could not meaningfully guide the dart once in flight and they would need the dart itself to be more steerable

This is false and not mentioned by your source.

citing unresolved problems with barrel life and a low rate of fire

Lol.

You were wrong about something. It's really not a big deal. It's worse to make stuff up to try to seem right and post "sources" that don't even mention what you're talking about.

The projectiles fired by the railgun leave the atmosphere and are GPS guided.

Please see the source in my comment above that I have included.

would not hit the target at the speeds needed

As a projectile falls, it is accelerated by the force of gravity and gains speed.

you would need to shoot so high that you would be putting the dart into a sub orbital trajectory and without guidance be lucky to hit anything

The projectile fired by the railgun is GPS guided. What you're describing is literally the exact situation it is designed for. It is intended to leave Earth's atmosphere.

The GPS-guided projectile will exit the launcher at approximately 2500 meters/second. On the way to its target, the projectile would leave the Earth's atmosphere, making it less susceptible to jamming or interception, and minimizing interference with friendly aircraft upon re-entry into airspace.

https://www.globalsecurity.org/military/systems/ship/systems/emrg.htm

You're simply incorrect about how any of this works.

They can't safely do this within range of anti-ship missiles and they can't outrange those missiles with guns.

This is nonsense, and the source you linked does not support or even mention anything about what you've claimed about trajectories. Did you just hope no one would actually read it? It does, however, talk about the sustainability problems with maintaining the railgun as well as the benefit of simply using the projetile developed for the railgun in conventional guns. From your source:

As the Navy was developing EMRG, it realized that the guided projectile being developed for EMRG, which weighs about 23 pounds, could also be fired from 5-inch and 155mm powder guns. When fired from EMRG, the projectile reaches hypervelocity (i.e., Mach 5+) speeds, and thus came to be known as the hypervelocity projectile (HVP). When fired from a power gun, the projectile flies quickly, but not as quickly as it does when fired from EMRG.

“We thought rail guns were something we were really going to go after, but it turns out that powder guns firing the same hypervelocity projectiles gets you almost as much as you would get out of the electromagnetic rail gun, but it’s something we can do much faster,” [then-Deputy Secretary of Defense Robert] Work said.

The trajectory of any projectile, including the shot of a railgun, follows an elliptic ballistic curve.

There's no such thing as a dead spot in the range. You just aim up.

We live in a terrifying time

Well, the nanobots that you are describing do not exist, so they aren't what is making the time terrifying

if you fling a thing slow enough for a over the horizon shot

That doesn't make any sense and is not how physics works.

can only shoot real close or real far away.

No!

shoots in a flat trajectory

Lol what? That's physically impossible, the projectile absolutely follows a ballistic tragectory like any other gun. A 20MJ railgun has a range of 93km, which is much farther than the horizon.

No, that's not the reason the railgun was not completed. It can only be used by specialized ships, and cannot be fired many times before extensive maintenance is required. It's too expensive to sustain. They also realized that they could get some benefit from using the more effective high velocity projectiles with conventional guns, anyway.

They believe compassion and empathy are "woke"