This question has been bugging me so I contacted John Barnsness on the subject,L Sherm and Ledd Slinger were correct Lil-Gun is to fast of a powder for use in the Vartarg,it's a perfect fit for the fireball,it all centers around the difference in neck size,going from .224 to .204 changes the bore/capacity ratio,vartarg needs a slower powder.He also said sperical powders get squirrley at max pressures,and that is exactly what was happening,I just had a hard time giving up on it because it was so outstanding in 221 fireball.