I think many people are confusing a HO (Head On) with a Front Quarter shot. And unfortunately many of these people came from AW, which teaches you bad habits.
In AW, the basic defense against BnZ attacks is to pull your nose up into the enemy's attack, which brings into play the "forward cone of invulnerability". No kidding. In AW, the server throws out 99% of the hits fired if they come from the front quarter.
Being a BnZ pilot I can tell you that I avoid HO's religiously. But if you pull your nose up to me during an attack pass, you better believe I am going to take the shot.
Long range gunnery? Only useful against non-manuvering targets, then only marginally. All it takes is to use a very light 1 G turn in your extension and its almost impossible to get hit beyond 600 to 700 yards.
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Vermillion
**MOL**, Men of Leisure,
"Real Men fly Radials, Nancy Boys fly Spitfires"