He's not a troll -- at least not intentionally. He's my son, and he asks me these types of questions all day & night. Sometimes his ideas are good (i.e. need minor tweaking). Sometimes his ideas are ridiculous (read: completely unworkable).
So here's the type of conversation I might have with my son on this:
A bullet is already explosive. There's a measured shaped charge in the bullet casing that when smacked by the gun's hammer causes a small explosion IN your gun that propels the bullet out hopefully in the intended direction (which is why there's a barrel to help you aim & why a crit glitch can jam your gun and burn your hand). There are hollow-point bullets, etc. etc. But what type of explosive could you put in the tip of a bullet that wouldn't be set off by the initial explosion in the gun, but would explode on impact? (and who wants to test these new bullets out?)
Are EX & Ex-Ex Rounds the best science has to offer in 2070? Who knows. However, I would never want to put (name your volatile explosive of preference) in the tip of a bullet to try to find out. These types of weapons could theoretically be possible (with much moderating on the proposed effects -- nerfed from what was proposed), however the only people crazy enough to create them and carry them around would be people with a death wish or completely fanatical about what they're going to do with them (i.e. willing to die for their cause). That puts these ideas into Evil Villain and Crazy Fanatical Faction territory i.e. the GM can pull them out and use them as part of The Story whenever they want, but the player won't have them in their own weapon. ("Sorry, they only had 3 of those bullets....")
Assuming your character doesn't have a Will to Die, your character wouldn't be in their bullet lab with the materials needed to make them, and no fixer would source or sell them for fear of someone dropping a few of them and blowing themselves to smithereens. It's a No Go™ even if It Could Be Possible™. It's a fun "what if" moment, an intellectual curiosity, and that's all. And it needs to stop there.
So anyway, folk, sorry for the inconvenience. The Shadowrun system allows you to make characters with build/repair skills, and between that plus Inspired quality plus the Juryrigger quality plus Artisan skill, my son's creativity, he's constantly coming up with these proposals for new gear/items for the game....the game is not made to say "This is the list of Stuff You Can Have™ and that's all that's possible." And that's become my 7-day-a-week headache
He's not trying to be a pain -- he's actually thinking of these ideas and thinks they might work, even if not for a character.
p.s. keep the Chuck Norris jokes coming
