Green Bullet was released in 1972, one of the very first deliberately bred high-alpha New Zealand hop varieties and a genuine foundation stone for the country's later breeding program — its genetics went on to contribute to Pacific Jade decades later, extending its influence well past its own commercial era. It arrived the same year as Cascade and Target on opposite sides of the world, part of a broader global wave of hop breeding programs chasing higher alpha acid around the same period.
At 11-14% alpha acid, Green Bullet functions primarily as a bittering hop, with a blackberry and earthy aroma that gives it more dark-fruit character than most bittering-focused hops carry, closer in spirit to Pacific Gem's black currant note than to a purely neutral bittering profile like Magnum's. That dark fruit quality has kept it in occasional use for darker New Zealand ale styles specifically for the flavor it contributes even in a primarily bittering role.
The IBU calculator handles the arithmetic for sizing a Green Bullet-based charge. Pacific Jade is the direct genetic descendant and closest substitute, sharing Green Bullet's earthy backbone with its own added pepper note. Pacific Gem offers a related dark-fruit New Zealand alternative from a similar era. New Zealand ale styles and stouts both use Green Bullet where available. Its alpha range matches Southern Cross's almost exactly, while Pacific Jade's floor sits a percentage point higher, making Southern Cross the closer of the two substitutes for a like-for-like bittering swap.