I'm going to have a gunsmith build three custom rifles for me. .257, .270, and .300 Weatherby Calibers and am currently getting plenty of opinions about the actions to use. So....since there are far more educated folks on this site than most I thought I'd ask for some help. Stiller, Borden, Badger, etc....Let them rip and please tell me why. All three are going to be hunting rifles.
BAT actions are the best. Why? Integral recoil lug, integral scope rail if you want one, they are available made from chromoly, if you want stainless they use a better grade of stainless than than the others, they have a larger barrel tenon, the extraction/ejection system puts the empty on the ground instead of bouncing it off your scope knob, The machining is as good as it gets.
I am a huge fan of Borden actions. Jim Borden was a career mechanical engineer for lots of years before he quit to build rifles full time. He designed and analyzed all of his actions using finite element modeling and also applies all of his experience to the machining process as well. I am a mechanical engineer specializing in mechanisms design and analysis in the aerospace industry, and when I talk to Jim he blows me away.
What impresses me even more about his approach to making actions and rifles, is he not only has a bunch of benchrest world records and national championships, but he also is an avid hunter. So he knows what it takes to make an action/rifle accurate and functional for it's purpose. Jim built me a 300 win mag around his Timberline long action with a Hart barrel. It shoots consistent groups in the low .3's and many groups in the .2's at 100 yards. For a magnum hunting rifle that weighs 8 lbs (without scope) i don't think it gets much better than that.