After shooting the slug liner in .30 cal not much difference from the pellet liner A. The pellet liner A for the .30 cal shoots NSA pretty darn good! My best results were the 55gr. Those were pushing 890fps@155 bar reg. Also i noticed the pellet liner shoots the slug faster by 10-15fps. My crown with 600mm .30 pellet liner does well with 47gr NSA @905fps 160bar reg. All shots were taking at 20 yards just a bit over 1/4 inch groups (5shots).