Cast bullets in a .270? Doesn't that defeat the purpose of shooting a .270- high speed, (relatively) long range? It's like shooting cast in a .300 RUM.
As for the guy who commented on using .243 for deer...
You, me, robinsroost, and many others here know that there is more to that story than what you are telling. I believe your friend's shot placement was not what it should have been, or he was using the wrong bullet for hunting. My wife ONLY shoots a 6mm Remington- a sped-up version of the .243 for those who don't know. She and the grandkids do the deer hunting in our household, and she has taken 1-3 deer every year with that rifle for the last 30+ years. She and that rifle have also been death to a few cow elk over the years. And no animal she has shot has ever run more than 40 yards.