in order to write an objective summary, I would have to be able to compare several different non-lead pellets. This is the first I have ever tried. The only comparison that I could make was against lead pellets. My shot groups with lead at 15 yards could normally be covered by a nickel. Without changing my scope settings the Hatsan Vortex grouped 1.5" to the left of the lead group. I had several fliers that were as much as 2" or more from the primary groups. I went through almost 1/3rd of the tin sighting my UTG scope on my HW30 trying to get consistent tight groups. Still had fliers in about 25% of my shots. Used a bench rest and every shot was made with the scope dead center on the bulls eye. Lead pellets were consistently more accurate. Possibly a heavier pellet would be more consistent.