I use mechanicals, rocket steelhead 100 grain. I like em because they fly as true as my field tip, i've not had any problems with them. I just took about a 200 pound 8 pointer yesterday morning with them. I didnt have a great angle and ended up hitting forward in the shoulder. Arrow penetrated 3/4ths of the way into the shoulder and the deer went 40 yards. Last Sunday i took a doe that didnt go 10 yards.