AHC: .950-caliber sniper rifle

Is that actual mass, or TNT equivalent? I'm wondering if it would be possible to have a nuclear weapon small enough to fit inside a bullet. (Probably not...)

In a bullet, no. However, there have been nuclear artillery shells. The Davy Crockett round is about near the lower limit of size for fission based weapons.
Not with U235 or Pu239. The minimum theoretical mass (without crazy implosion schemes or the like, which also aren't going to fit in a bullet) is a few kilos.

Davy Crockett was 11" dia, as were the smallest nuke artilerry shells that I know of. (11" = ~28cm, if anyone wants real units...)
 

NothingNow

Banned
Is that actual mass, or TNT equivalent?

Actual mass, either of the explosive content or overall. Sorry.

Also, the smallest nuclear devices ever issued were the 155mm W48 and 152mm ZBV3 Nuclear Artillery shells. The W48 used about 13kg of plutonium, and was expensive as fuck compared even to other tactical nuclear weapons, due to the trade-offs needed to make the device actually fit in a 155mm shell.
 
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