Hello Bill
The pentagon hollow point is not easy to manufacture, in extensive testing this cavity is the only cavity that will work for air guns and regular firearms. Yes, there is a very big difference between air guns and regular firearms, maybe some day we will see air guns approaching regular firearms but at this time air guns have a long way to go.
How did the different diameters [.356 .357 .358] work in your 9MM barrel were the 127 gr ok or do you need lighter pellets?
