SI The Joker, on 14 November 2014 - 09:11 AM, said:
Clan Mechs: Yes
IS Mechs: No
Why? Free CASE in Clan Mechs. Now that I think of it I never have looked to see if I have CASE on CT for the one mech that I have ammo there... so maybe it buys me nothing?
*shrug* Can't really put that ammo anywhere else, now can I, though?

CASE will not stop an ammo explosion. If an ammo explosion goes off in the CT or side torsos, those sections will go.
Xetelian, on 14 November 2014 - 09:13 AM, said:
Put it in the CT in both clan and IS mechs and no adverse effects to note. If you take enough damage to your CT that your ammo explodes you were probably going to die the next second anyway...but I still don't recall ever having it explode.
I died by ammo explosion in a Clan Mech. It just happens that the other side torso was gone, thus the ammo explosion on the other side torso was fatal.
I expect to see more due to my own build though.
Anyways, putting ammo in the CT is a risk. Since ammo is consumed there first, you better expend that ammo ASAP or someone coring you will accelerate your death.
You can risk 1 ton, but if you can't spend that 1 ton quickly (like MG ammo), it is a liability. It's actually worse if you get cored pretty quick.