How heavy was the early quick-firing six-inch shell?

How much did the early quick-firing six-inch shell weigh?

About 45 kilograms, or roughly 100 pounds, per shell.

The early quick-firing six-inch projectile is given as roughly 45 kilograms, or 100 pounds. Loaders had to move that weight repeatedly on a rolling ship. A theoretical rate therefore says little about how long a crew could sustain it without relief. The figure helps explain both the large gun team and the later attraction of mechanical handling.