I have come up with a load for my .243 that is VERY accurate (sub .25") at 150 yards. It uses a 55gr Sierra SP bullet and 41.5gr of IMR-4320. Will this bullet work on coyotes? I have killed several coyotes with a 55gr Hornady bullet in my .223. Anyone have any experince using light 6mm bullets on coyotes? Thanks for any info.