[supercat]

Hate to burst your bubble but an 180 gr. bullet, regardless of what it is made of, will have the same energy and trajectory as any other 180 grain bullet of the same ballistic configuration.

A copper bullet which is dimensionally identical to a lead 180gr bullet will have less mass. A copper bullet with the same mass as a lead 180gr bullet will have to be larger.

[calex59]

A 180 gr bullet, regardless of what it is made of has the same weight, got it? Therefore at any given velocity, the energy of said bullets will be the same upon impact. Barnes bullets penetrate as well as any lead bullet. A copper bullet of 180 grs will be slightly longer than a lead bullet of the same weight, which means that the copper bullet will have a higher ballistic coefficient, will means it will hold its velocity better and penetrate slightly better.

Barnes bullets(which I do not use, BTW)cost more than lead bullets but their performance can't be denied, neither can their commercial success. BTW, they already sell to the military and have for quite some time, ditto to LEOs.