I'm going to be working up a load for a new bolt action .223. I've only killed one coyote with a .223 and it was pretty un-eventful. I have to use lead free bullets and I'm going to try the Nosler lead free ballistic tips first. I've found load data for 35gr bullets at 4100fps, 40gr at 3800fps or 50gr at 3500fps. Which one would you start with? I can try them all eventually, just looking for a starting point.