I have been using 12g cartridges & they work fine - specifically the bottom canister holder screws into the top trigger section completely - recently I tried 16g innovations cartridges , both threaded & non-threaded & couldn't screw the bottom section of the pump completely onto the top .

the problem is that the 16g is slightly longer than the 12g - since both cartridges are much thinner than the canister holder , I don't understand why the 16g wasn't simply made the same length but fatter than the 12g to accommodate the added volume.

I can continue to use 12g cartridges or simply buy threaded 16gramers & leave the bottom of the pump off.

But my question is , has anyone else experienced this ?