That doesn't really tell me anything.
If you are a level 1 character fighting mobs with 10 hp, a setting of 250 would still be too high.
I'm going to give you the benefit of the doubt that you're fighting mobs with more than 250 hp though. If that is the case, then I am not sure what the problem is. The easiest thing would be for you to send me your log so I can try it myself.