RE: 243 bullet
They'll do fine, they are a harder bullet and give reliable exits on lung shot deer...I've killed 12 or so and 2 buddies have killed another 50 or so with them...My gun shoots CoreLokts better so I use them and the Federal Premium 85gr HPBT...
See how your gun likes them, then shoot a dozen deer or so and see what you think...The beauty of a .243 is there are plenty to choose from...