The smaller ball needed to be a certain weight for it to be able to be shot at or below 300fps. For the ball to be that certain weight, Tom Kaye from AGD (who had already put all of his knowhow into extensive research in 50cal years before) said something like, its not possible to get the weight in the ball without using Heavy metals, or toxic materials or crushed glass etc. Said with current PEG formula it was not possible, and if it doesnt make the weight, it wont act the same as a 68cal paintball. 50cal folk promised it would make weight, it was released, it didnt make even close to the weight needed.