3 hours ago, Armantium said:

What other kinds of ammo would fall into the 3 categories. I need at least 3 per category.

Your are going by this all wrong. Guns and ammo don't work like that.

First ammo is mostly rated on it's stopping power. Second the gun firing the ammo will greatly effect it's stopping power and drastically change the mechanics.

So lets say your ammo is arranged as follow : .22 LR, .17 Aquila, 45 ACP and 9mm.

To a person with little to no knowledge of ammo that would look right, It is in order of caliber. It's wrong the .22 LR and .17 Aquila are rifle rounds as such they hold much more gun powder than both the the 45 ACP and 9mm.

So your light, medium and heavy ammo is more a question of handgun, rifle or sniper. Except that is wrong also as there is many handgun  ammo that has more stopping power than rifle rounds. Not to mention that most guns can often only be loaded with one caliber safely.

The question here is do you even need this info. Because if your game is based on realistic firearms you will need to use realistic values. As there is no real "light medium and heavy" ammo and no ammo that fits all guns this isn't possible. So you will need to change the way your game works to a more realistic scale.

However if you made up your own guns and ammo then there is no problem. You could use it without people complaining. With your own guns there could be some kind of light, medium and heavy ammo that works with all guns; instead of forcing the gun to be rebuilt for each ammo type.

If you want list on ammo search "compare X gun ammo" as in "Compare handgun ammo".

4 hours ago, Armantium said:

In my European, socialist, shitty country(filled with submissive socialist zombies) weapons are completely forbidden,

All that means is that you need to join a sports gun club. Here in my own country we had similar laws, so I had to join one to learn more about guns. If you can't join a club then first do some basic research on guns before implementing them into your game.

So, basically, you can make a universal ammo with different charges, that would perform with drastic variation in different guns - pistols, rifles, miniguns?

8 hours ago, Armantium said:

So, basically, you can make a universal ammo with different charges

You could use a common caliber and just attach different charge to it, however even if ammo has a common caliber it isn't the same. Look at the images linked by @ericrrichards22 they are the same caliber yet the way they look is completely different, the way each fires will also be completely different.

The only thing the ammunition share is there caliber.

Think of the MP5 it uses a small roller-delayed blowback mechanism. So loading your MP5 with 10mm or 40.cal causes the gun to perform poorly in almost every way. Not to mention you don't get the full power of each round so you are just buying larger ammo for no reason.

Both the 10mm and 40.cal MP5s did exist, they where just discontinued after poor performance, with the MP5/10 coming back in to popularity with so many people thinking bigger is better.

Then there is the fact that just because a caliber is bigger doesn't mean the ammo is better. A 50.cal round with a small cartridge won't be as effective as a 22.cal with a large cartridge. Then there is the fact that some calibers don't work well with all cartridge sizes and with some gun designs.

So you can say that caliber*powder = power and it would work in a fantasy world.

You could also say your handguns uses a 22.cal light and 22.cal medium and 22.cal heavy, in a fantasy world that could work, however in real life there isn't any handguns that fire the large 22.cal rounds.

I just remembered that Deus Ex 2 had universal ammo, and it made it worse than the previous one, among other things, so I don't think I'll go that route after all.

Although they did have a fairly reasonable explanation-

Quote

 

Each magazine is loaded with a nano-mass that is dynamically configured by the weapon itself into whatever form of projectile is needed for the weapon that the magazine is slotted into. As a result, by 2072 most forms of case and caseless ammunition have disappeared due to the benefits that universal ammo present.

In general, heavier weapons use up more ammo per shot. The user will get many more pistol shots from a single magazine than from rockets or flamethrower strikes.