I know Jack and others have done quite a bit of testing with various setups including regulated. I don't know the results offhand but I think folks have found some benefit in efficiency from running regulated setups in both the sheridan and nelson world.
I think the first question I have is, when you're going after the ultimate nelson valve design, what are you looking for? Some folks seem to want to stretch a 12g as far as it will go (40-50) while throwing some consistency out the window. They might be willing to have some FPS fluctuations or drop off at the end in order to get more balls out of the barrel. My goal would be a reasonable amount (30-40) of perfectly consistent shots in the 280 fps range.
Note: While I would love to take credit for his work, I am not associated with Mad Customs!
Originally Posted by senghing27
You can contact BigMatt-MadCustoms in his MCB forum