shootdown

[INFERNO]

Sup guys. I'm new to mags and im having a real problem with shootdown, its driving me nuts. Anytime i shoot a string at more than about 4 bps it just starts sputtering and my paintjust rolls out the barrel.it shoots fine for about ten seconds before it dies. Im running a 68/3000 pmi pure energy compressed air tank. i dont think my air would have anything to do with it but i thought id let u guys know just in case.

[INFERNO]

Its a 68 classic

[Mav D MagMan]

Unless you are short stroking your mag... What input pressure is your tank? Mag's need around 800-850 (you can go slightly lower with an adjustable tank) also do you have an inline reg on there? Take it off and see what happens.

Mav

[Spudchucker]

i had that problem too when i got my mag. I dont know what you can do. When i went retro is when my gun stopped doing that.

[INFERNO]

the pressure is 850 and i have an x chamber but not a reg

[INFERNO]

i dont want to send it to agd if i dont have to cuz its only a 1 star valve

[Spudchucker]

it might mean that a valve is to tight or something is obstructing the airflow. Thats what the manual said

[wepu]

It's probably an obstruction. Try getting rid of the expansion chamber. (it only does good with co2) Make sure you've got a full tank. Screw the tank in all the way, then a quarter turn out. (sometimes if it's all the way in, it'll obstruct the output)

If that doesn't work and you've got any additional funny business going on in the air path, get rid of it. (I had a slide check that wouldn't flow enough air.)

[bambam]

On classic AIR valves, shootdowns, as you described, would most likely be related to the recharge rate in the air chamber.
Although other factors can contribute to air blockage (like dirty inlets, dried orings, etc.), you have to start from the back and work your way to the front.
As stated, Spudchucker had the same problem and resolved it when converting to the retro valve.
Well guess what?? The Retro valve has a much higher recharge rate than the classic valve.
Anyway, to get to the point, you might want to check the regulator seat. Could need replacing.
While you're in there, also check the valve pin and spring.
Get past this point and see what happens.
FYI: Get a rebiuld kit in case the whole valve needs cleaning and parts replacement.
Hope this helps you out...

[athomas]

Check your bolt spring. It may be weak due to wear. If it is short it will cause the problem you are experiencing. Replace it and see what happens.

[INFERNO]

the srpings good if its in front of the bolt right

[Lone Brain Cell]

I had the same problem with Mine, so I ended up chasing it down to the Air America Reg. I got a good deal on a maxflo. Now No shoot down. Can you try someone elses air system?

PS Don't get discouraged with it, once you get it going you wont look back...I didn't

[PyRo]

First be sure that you are fully pulling back and releasing the trigger. Not doing so will lead to short stroking which has results similar to those you described. Another possiblity would be that of a bad reg seat. When your reg seat goes back, it can cause velocity fluxuations and shootdown.

[athomas]

Originally posted by INFERNO
the srpings good if its in front of the bolt right

Ideally the spring should stick out beyond the bolt by about 1/4". If it is just out past the bolt, it is suspect. The length of a new bolt spring is almost 2".

When in doubt try it. You should keep a spare bolt spring around anyway.

[INFERNO]

Thanks guys I fixed it. I have a screw style on-off on my drop and I had it screwed in too much. I just back it off about a half a turn and now I'm once again in love with my mag.