For anybody here who doesn't already know:
The term "boat-tailed" in regard to projectiles means its rearward portion tapers down as it approaches the flat base (like the back end of a boat does), instead of being cylindrical from its middle to its base. The tapering "tail" produced better performance. The famous British projectile-designer Sir Joseph Whitworth applied that principle to his artillery projectiles in the early-1860s... but it wasn't applied to bullets until the very-early 20th-Century. Here's a photo of a "boat-tailed" copper-jacketed World War 2 Browning .50-caliber Machine-Gun bullet, which is very similar in form to VAbeach31's bullet, but a larger caliber than his.
