I'm getting into reloading for my .223. I have a bolt action savage with 20" barrel and a single shot h&r with 22" barrel. both with 1:9 twist. Both absolutely love 70+gr rounds. First question is would I gain anything by using nickel cases instead of regular brass? And my big question is whats the best way to get at least close to subsonic for the savage? Ideally i would like to be able to shoot a squirrel or rabbit if coyote hunting isnt going well. Any advise would be greatly appreciated guys! Great forum by the way!