Well the design has changed, back in the 70's all I remember is dirty squat things with ribs/grooves ie marksman/spitfire look.

now we have the smooth profile ie JSB, with a multitude of different radius heads, some pointed, some hollow point, short skirts, long skirts or with a cast waist like the Bisley Superfield/H&N FT or more slug shaped like the logun penetrator.

But the basic diabolo/shuttlecock shape works so the design will remain based around it, and tins are the obvious container to supply them in.