HELP, King arms grenades !!!!

[Padkiller]

Hi guys, so today, I received my grenade launcher + 3 king arms full metal grenades ! (those 120 rounds nades)
So, when I received the grenades, they were fillled with a bit of propane and a few bbs. I shot the grenades to test them, everything was fine !

Later today, I wanted to fill them all up to see the bbs fly around !
But, as I filled the gas, the grenades, all of them, become cold, just like a GBB pistol mag after you shot it, but the gas seems to "leak", I mean that the gas doesn't stay inside

Can someone help me, it's my first time with grenades !

Thanks !

[Styrak]

You have you reset the valves. Either press up hard on the release as far as they go, or unscrew them a half or full turn. I think they should click either way.

[Padkiller]

Thanks, I didn't know you had to reset those, dang, I'm a noob !!!!

[Styrak]

Some shells you have to, some you don't.