I have a .17hmr which load wise really sucks, its a little to much for squrriel and can be questionable for coyote. So I'm thinking about getting a .223 bolt action and loading some sub sonic loads for squrriel which i think a subsonic fmj will just pass through and do what a .22lr does, but i also want to use it for coyote hunting so il be loading a hotter load but not quit a full load. I'm kinda new to .223 and will be reloading soon for some if the guns i have that ammo is hard to find and only etting harder. So does anybody have a suggestion on twist rate for my application?