So after having several failures to puncture the bottom co2 cartridge and going through several forums I came across a solution to the rifle not liking Crossman. CO2 cartridges which is all I came find around where I live. Found a suggestion on the pyramid Air forum to place a dime between the 2 . 12 gram CO2’s tried it today and voila both cartridges puncture tried this several times with no more issues so try this if your having the same issue with yours
JRod
JRod