I don't agree with shooting through brush either. Normally the term brush gun means that the gun is short, light and balanced well so it is easier to carry and maneuver in brushy areas. Most do not advise shooting any bullet through brush or foliage. And you could also get harder cast bullet for the .243 that would probably perform just as well when shooting through stuff, but they wouldn't perform as well on the game.

This is one of those things that boils done to opinion though and we could discuss it forever. It's easier to just concede that some believe one thing and others believe something else. Neither may be right or wrong.

Paul