Propane Adapter Help

[dogoxin]

I have a KJW M9 GBB pistol. I recently purchased a Madbull propane adapter v2. I fill the magazine with propane from the adapter with silicon oil with the usual 3 pumps for 4 seconds (just like I would with green gas) and I am barely getting enough gas into the magazine for one mags worth of shots. By the end of the magazine (sometimes before) I am out of gas in the mag. Previously with Green Gas I was getting enough gas for about 3 mags worth of shots. I am not sure what I am doing wrong. Any help Would be greatly appreciated. Thanks!

[Indigo]

Is this a new or older tank?

 If its older, grab a new one as that one could not have enough propane to cycle properly. And check the mags for leaks that may have developed