So as many of you know, California will soon be a lead free hunting state. I am looking into getting/building a California specific rifle for deer. As of right now My go to hunting rifle is a pre 64 Winchester model 70 in 300 H&H that I have perfected and don't want to have to reload it for lead free. I plan on using Nosler ETips and would like some opinions as to what would be a good caliber for my application. A few things that I am looking for: a caliber that will reliably expand the ETip at 500-600 yards, brass that is easily attainable for reloading, preferably a rifle on the lighter side for the steep canyons/mountains I hunt, and a rifle with recoil less than a .300 Win (not that it bothers me, but our deer here have small bodies so I feel it is unnecessary). These are the 3 calibers that have peaked my interest, but I am open to other suggestions. What do you think would work best?