I might be wrong, but my conclusion is that the best way to deal with copper bullets, is to move up 2 solid caliber levels from where you are with lead bullets.
In my case, starting with a .270, I am considering my next rifle to be at least a 338 or 375. (maybe 416 if I get silly) I guess I can thank CA for giving me a reason to buy another gun. (trying to find the silver lining in all of this)
I am very impressed what has been accomplished with the copper bullet technology, but when you really compare the "perfection needed" to make it work, the difference between having exactly the correct bullet ready to go, distance, and hitting a bone or not make a huge difference.
The easiest way to regain some margin for error, is to move up in caliber and the sweet spots for BC are 338, 375 and 416. It seems silly to use a 375 on a deer, but that is the hand we are being dealt. If there were no such thing as alloys denser than copper, it is entirely possible that few people would own guns smaller than 338 at all.
Start with your elk / bear rifle and that is now your deer rifle.
I agree though, Barnes is at least 50% marketing overhype. I am tending toward GS right now.