I always remember one in an early Judge Dredd story where they were at war against the soviet mega city. The soviets had these range finding weapons that could shoot through walls. Dredd realised that if he could run towards them fast enough then they could not change the range quickly enough....the result was obviously not good for Sergei and his comrades.
Didn't sam slade have a cool gun too?
[PS given the prominence of this forum on Google search rankings, I half expect my miscreant colleagues to find this....message: Back off these are my finds, go write some SQL or whatever you techs do on a wednesday evening ]