I experimented with props, I tried 2, 3, 4, & 6 blades. I found there was very little difference between 2 & 3 blades but 4 & 6 tended to maintain a hover better but seemed slower to respond to control, ie. drift out on corners a bit more. The real downside to 4 & 6 was the damaged much easier in even a small crash, I have two 250 size FPV quads that I still fly one with 2 blades and one with 3 and I think I prefer 2 blades although there is not a lot of difference. I always use bull nose in 2 or 3 bladed mainly because they don't damage as much.