Well, one thing that would be different is that now you can get both gun and ammo research from just the gun (or just ammo). Which would be mildly different for enemies with only one small clip in the gun and no extras who are just likely to use it all up. That, and battlefield explosions destroying ammo before guns, again limiting access.
I don't really think there's a lot to be gained from that as opposed to merging the two research projects as things stand right now. But there could be things not in the mod that would make it a bit more interesting. Like being able to research and use guns somewhat earlier, but not ammo, until you unlock a new tier of power source research. So you'd only be able to use looted guns, even if you knew what they did. Research trees going off alien/shadow org weapon power tech instead of the guns themselves. Stuff like that.
And finally, it's a nontrivial amount of drudgery to eliminate these research topics, and even more if Solarius discovers he did want ammo to be a separate research line two years down the road.
nobody in something like xcom (even at the earliest stages of the project) knows any details about combat performance of an AK rifle
Early X-Com is mostly law enforcement and a few dozen agents total. I find it entirely plausible that not one of them has even handled an AK, never mind knowing precise testing data about its performance. I mean, militaries spend
years on such testing even when their own soldiers know how to handle the guns and have combat experience.
It's arguable whether anything even remotely as accurate as Ufopedia info actually exists IRL for even the most well-researched guns.
5 days being too much and acquisition providing you with all data in 2 days are things I don't disagree with you about.
Yes because I believe "my spiffy new DE" isn't an alien plasma gun and data about its performance is widely available even to the general public, you can just google that kind of stuff right now...
Can you link me to a
detailed terminal ballistics study on, say, a .357 DE? One with numbers and all?