Why is a drum 55 gallons?

Why is a drum 55 gallons? The unit “barrel” was still 42 gallons while the container was 55, so the 55-gallon steel drum kept being pushed farther and farther away from the industry that invented it. … The barrels have instead made the transition into other industries, carrying supplies and materials for countless other products.… Continue reading Why is a drum 55 gallons?