I want realism in the sense that one or two rounds will kill any unarmored human(Even the player if they qualify as unarmored), or any critter similarly sized.
Much past that I don't think I want it hyper realistic.
I believe the term you want is a semi-automatic. Also, some guns have a latch you can tap with your thumb that releases the slide lock. The Ruger .22LR semi-auto I used to have was quite touchy, sometimes the slide wouldn't actually lock when it ran out. It would fly back, miss the latch and slam all the way forward again. Only clue it was out was the click if you weren't counting shots. You'd have to pull it all the way back to cycle it. Sometimes if you slammed a mag in hard enough it would unlatch just from the force of the mag. It rarely actually jammed(About once per 100 rounds, which was very infrequent for how little we used it, and it had to be fired as fast as possible for it to do it), but the slide still acted wierd.
Honestly, I'd expect a semi-auto in the Wasteland to operate more like the Ruger I had than a proper semi-auto due to age, wear and tear. Slide latch doesn't quite work, random jams when spamming bullets, magazine that doesn't want to advance rounds properly, things like that. It's been sitting out in the desert for two hundred years, it's not going to function properly.
I think it would really depend on where the weapon was found. My M1891/30 was made in 1939 it was refurbished between 1970 - 1979 and I picked it up in 2010 and the thing cycles perfectly zero jams and everything works fine. The refurbishment on this rifle was the stock was swaped out with a post war stock other than that all the mechanicals are the same from 1939 which went through all of WWII. So I think a pistol can survive 200 years and still work properly if it was taken care of.
Now if the slide is acting weird and not catching on the last shot I would say have a gunsmith repair it or if you feel compeled to try it yourself replace the slide lock spring. Apparently the tension is so low or the spring could be broke that the force of the recoil spring is overcoming the spring holding the slide lock up and just bypassing it.
I get what you're saying, and agree that it's very silly. I think it was an episode of Sanctuary that I was watching, and actress (can't recall names, played Sam Carter on SG1) racked the slide on her pistol THREE times without ever doing anything else with it. Fallout 3 didn't suffer from that problem, though it did force you to action the weapon every reload.
However, the most egregious case of excess animation was Lincoln's Repeater. Every time you action the lever, you push the rifle away from your body and tilt the barrel up to the sky, instead of keeping the stock firmly against your shoulder. Every time it happens I tell myself they probably only did it to balance the rate of fire, but it still infuriates me to watch it.
Have you fired a lever action rifle before? I have one and theres no way in hell you can [censored] the lever down to eject your fired round and load a new round with the rifle against your shoulder. This one here is so damn tight you have to hold it upside down and use two hands just to get the lever to drop. Might be because its new but typically a lever action rifle is not going to be shot super fast from the shoulder without either A. pratice and alot of upper body strength or B. the weapon was designed to be used quickly. Those lever action rifles used in cowboy action shooting compeitition they can cycle fast at the shoulder like in the old western movies but those lever actions are $1,000+ specailty items made just for that. Mine was a typical commerical model I picked up for under $500. Hell even the straight bolt on my M1891/30 is hard to cycle with the rifle on your shoulder, but thats because its a military rifle with an extra stiff spring and the bolt is a short 2" straight bolt compared to a curved angle bolt which gives you more leverage.
The only thing that was wrong with the Lincoln Repeater rifle was how it was loaded. Lever action rifles like that load from the side and the cartirdges slides forward into the tube magazine. The animation we see is the front is being twisted and the cartridges being dropped down the tube magazine from the top like on my glenfield mod 60 .22 rifle. Problem with this is mine you have to pull out a brass tube with a spring and plunger before loading. The one in FO3 didnt have you do that so theres basically no spring to force the next cartridge back to the action to be cycled properly.