Things I liked:Awesome penetrating power and accuracy in my Hatsan 95. Things I would have changed:Would be nice if they were less expensive - as I would use them exclusively. What others should know:They are not tight fitting into the breach, but perhaps they don't need to be because the plastic may expand easier than lead during firing. The bottom line is they performed really well for me.
Things I liked:Excellent penetration and accuracy in my Crosman 1377, Ruger Mark-1 and old Daisy Powerline 880. They are also easier to handle and load than standard lead or lead-less due to their size. Haven't tried them yet in my Crosman Sierra Pro. I'll update when I do. Things I would have changed:Price. If they were cheaper, I would use them exclusively. What others should know:They don't fit real tight in the breach (all 3 guns), but that's obviously not a problem because they sure do perform great out the muzzle end. I'll save them for eliminating pests instead of target fun - because of price.