Looks like it has been a while since anyone posted here so lets see some more added.
I just had my first tactical built and chose Brux based on serious input from experienced shooters, It is a .260 Ackly with a .297 neck, 30 inch barrel, and shots Berger 140 Hybrids. I found my best load at 49 total round through the barrel. It produced a .268 3 shot group!!
This barrel has not shown to date ANY copper fowling.
Using Brux did however cause me ea major problem. None of my stable of pure Benchrest rigs can produce a group ANYWHERE near this tactical. For those interested, the load was H4350 at 45.6 grains. Bullet is .052 off the lands. There is a slight crunch going on during bullet seating. Don't try to get there TOO FAST.