Firstly, I'm talking about 1,000 attacks made against rock crabs, not killing 1,000 rock crabs. Secondly, I've tried this experiment unsuccessfully before with a sample size of 200, and because of the random number game that Jagex has in place that effects so much of the combat system, I'd much prefer a 1,000 sample size. No one needs to record anything except for me, I'll record every last hit you make and crunch my numbers from there.