08-08-2015, 04:36 PM
Save your time trying to break one of those BHW's in. It's been virtually everyone's experience that those Polygonal 3P tubes shoot well from the first round. Any mention of "break-in" from BHW has to do with laying down a guilding layer of copper within the bore. This is why Carl from BHW recommends you avoid Ammonia based cleaning solvents.

