The maximum FireInterval is 255. I don't know if you intended this or not, but it is. If you go above it, it loops round to 0 again.

I was setting the FireInterval for the barret at 300, and it fired twice a second, so I figured that the maximum would be at 255.

It's not really a big deal if you can't make this bigger, but I posted it anyway in case other people get the same problem.

mmh maybe the max values for all those weapon wars should be listed somewhere ;o

It is probably intented, several values are specified to occupy 1 byte of memory in order to optimize the code since they dont need to be higher.

Palloco is right. Make the Barret a 1 bullet weapon and set the reload time higher, that will work.