I think I'll try another valve, last try I say. Must find a place closer than Japan to order because of the 20us shipping (for a 15$ valve)!
For the can test, I'm killing energy drink cans everydays. But I find it very weird to be placed at 1-2 inchs? I'm firing at 5 meters distance and easily passe the side can test (one side only and the bb goes inside). Samething for my Tm M3 Marui (but maybe a bit weaker). I'm guessing pretty well to passe trough the can entirely at a close distance as 1-2 inchs. Note that I'm heating the mag (with gas) with an air dryer to make the propane expand for more psi. Anyway, will try tomorow with a Coke can (maybe different thikness)