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Disappearing Air-Leak? - Help!!

2768 Views 7 Replies 4 Participants Last post by  PsychoYumYum
So.... this has been baffling me for a while. I have an CMYA M14, with upgraded motor, piston+piston head, and air nozzle. When I test compression its all pretty good (I know it could be better but I'll live with it). However here comes an the issue................ when I put the gun together I get about 190 fps if I load a single bb in the magwell or use a magazine BUT if I muzzle load the gun, tilt it back until I hear the BB make a seal, boom! 410 fps (which is what I was expecting)

So in summary:

(high cap) Magazine = 190fps (no hop set)
Muzzle Load = 410fps

I've tried this with different bucking, changing the hop, rhop even. its consistently bad :(

the best improvement has been trimming the lips off a bucking, I then get about 330 fps if I muzzle or mag feed the gun.

ideas anyone? I did try a google and haven't seen anyone else with this issue
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You could in theory purchase yourself a civil war outfit and muzzle load it on the field :hehe:

On a more serious note, it seems to me as if loading from the mag restricts the nozzle somehow. Can it move freely? It evidently gets forward when there's no mag inside, but it may behave badly when there's a bb in between the mag and the chamber... I'd look there.
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