stock minimag shootdown question

[phantomhitman]

For the first time since I bought the gun I actually got to fire it today!! I must say I was impressed and there were no chopped balls. It is an all stock, level 7 minimag. The only aftermarket part I have on it is a zbody, which is pretty fun to play around with. To get speed on the ball I had to turn the spin almost off on the zbody though, now it floats and has power! I am running a 3000psi hpa setup. But to my question:
I can shoot 2, sometimes 3, shots in a row with no shootdown. However, if I try to shoot 5 in order the 4th one falls short and the 5th just plops out of the gun. I want to know if this is normal? I will be upgrading to a xvalve shortly, but I wanted to know this about the old valve. With the new x valve, at what point does shootdown occur? Thanks for helping this mag noob out again, everyones input has helped me out alot so far.

[PyRo]

First make sure you are fully pulling and releasing the trigger. If you are it could be a reg seat.

[ChucktheMAGician]

You won't be able to experience shoot down on the X-Valve W/ a mechanical frame I think it occurs around 26 or 32 bps. If the problem is short stroking, that's something you'll have to work on yourself!

[phantomhitman]

i will check the reg seat, and work on my pull. oh well, worst coems to worst i will jsut wait for the x to come. then the intelli or hyperframe, then the ule.....ok so you get the picture. thanks for the info

[PyRo]

Hmm, you need dial calipers to check the size of your reg seat

[athomas]

How old is your minimag? Check to see if the on/off top is the old style with the X on one end. The on/off top sits in the on/off hole with the X oriented towards the outer edge of the valve. If it is in backwards, it will cause shootdown problems.