Reply To: Sizing pellets for FX ST barrels
I have found the same issue in .22 being that heads are smaller than the groove diameter and therefore only ride the lands. Your issue appears to be similar but with an ST being the smooth bore has a diameter larger than pellet head size. At that point I wouldn’t waste the time sizing. Mileage may very, but best results for me have been pellets sized both head and skirt to actual groove size.