GBB can not fire anymore than 8 rounds

[Skladfin]

So just got my HFC M199 today, the semi version.

fired off a few rounds to see what its like on propane, and no matter how full I fill the gas, it will only fire 8 shots before the gas runs out entirely.

its my first GBB(yes, surprisingly), so I have no idea whether this is a mag problem or the gun's problem.

if anyone can enlighten me, that'd be nice

thanks!

[Styrak]

I'm assuming you're not an idiot but I have to ask anyway:

How are you filling it? How long? Etc?
Any leaks? measured the FPS of your shots at all?

[Skladfin]

I fill it for 6 seconds, filling it like I filled all my other NBBs.

I put my ear beside the bottom of the mag and I dont hear any leaks going on.

FPS is at 270FPS, and by the 4th shot its around 250FPS, then 230, 220, 200, 150 ish., and then it doesnt fire anymore

[arman]

that sounds fkin weird....

[seventhsealairsoft]

did you lube the slide and mag

[Styrak]

Originally Posted by Skladfin

I fill it for 6 seconds, filling it like I filled all my other NBBs.

I put my ear beside the bottom of the mag and I dont hear any leaks going on.

FPS is at 270FPS, and by the 4th shot its around 250FPS, then 230, 220, 200, 150 ish., and then it doesnt fire anymore

Very weird. Maybe there's something wrong with the fill valve, so not enough gas is getting in.

[bean]

are you willing it with the fill nozzle of the tank down or up

[Skladfin]

tank down like usual

and yes I lubed the fill valve and slide

[SDS_ShooterMcGavin]

Maybe cause its a HFC.

[Skladfin]

buddy's got the same gun

his fires a mag and half with full fill

[SDS_ShooterMcGavin]

[Styrak]

Another stupid question: Do you have a full propane tank?

Also, didja read my post at all? Valve?

[Skladfin]

have no idea how to check the valve, it seems fine, no different than any other valve I've seen

also, its a full propane tank =\

[Skladfin]

it fires fine now.

seems like there's some kind of break-in period with these things? every single time I finished the gas, refill, and did it again, it could shoot 8~ish more times. Now it can fire 2 full mags, pretty awesome.

thanks

[bean]

Hfc pistols have a stupidly high lemon rate. Especially with there mags. I have worked on 4 i think so far. Most were fixed with a new mag.