http://wardsci.com/search.asp?t=ss&ss=aspirator&x=20&y=10 Can't remember which site I got mine from though. They were $9 and change. It took me a while to find them on a site where you didn't have to be a licensed teacher with a school account. Depending on what site your at they could be venturi pu...

No, not cheap plastic, real venturi pumps. School and scientific supply stores. The cheap places to get brine shrimp by the millions and venturi pumps.

If anyone else wants venturi pumps, order them from school/scientific supply companies. Pretty much anywhere you get sea monkeys and plastic petri dishes. I usually get brand new ones for $8-$10. The only ones Iv'e seen on ebay for a reasonable price were old and did not look to be in great shape. :...

I have not noticed any way of categorizing bbmgs. If two people have the exact same gun but different psi sources, you get different results. Does any one have any ideas like 0-50 psi. being light, 51-100 psi. medium, 101-150 psi. heavy? Or is there something in place already and I have not seen it ...

I'm going to try and make one on Easter, and hopfully get it online that night.

Totally f#cking awesome!!! Thats the kind of info I need all around. Best round of posts I've seen in a long time. Anyways, I have a 35 gallon 4.5 or 5.5 horsepower compressor. I have 4 guns that all have 1/2 inch pvc vortex tubes. My main air tank sits between 130 and 150 psi(I've never let it pump...

Why 3 seconds? Wouldn't a longer timeframe give you a more accurate count?

What do you think is the most legitimate way to find your rate of fire? Use a stopwatch on a preallotted amount of bbs, say 100, 1000, or 10,000. Then divide the rounds by the seconds it takes to fire them, or does anyone have a better idea?

Thank you jackssmirkingrevenge. You cleared that up for me.

What about completely eliminating the vortex so that the bbs have no surface to go around? Stick a magnet in the bottom to hold them in place in the barrel at the bottom of the feed.

I'm not going for easy. I just got a 1/2 inch x 2 inch x 4 foot T6 aluminum bar and a Hudson 800 psi spray gun. Both free!

Wouldn't it be more effective to have the air flow in from the side than the bottom?

I'm ahead of the game on that. I make my guns with a 3/4 inch bb chamber that just screws on.

It may work. May not smell great, and you definatly would not want to be smoking anything.

Building from the outside in?