Anybody here have experience with these? I got a couple hundred to run through the .243 's I load for. I have them tumbling on moly as I type this. I'm thinking H414 and IMR4166 for top velocities. I don't currently have either. I do have some IMR3031 which looks like it will "work", but I wouldn't buy it just for this application. Hope to smoke some coyotes this winter with these however I've been doing more loading than shooting here lately.