After a large amount of testing your products here is what we came up with.
 
Shotgun
 
We shot over a chronograph before using the product first. We used two types of ammo.  We used RIO ammo and KENT ammo.  Both advertised 1200 fps.  As our test the KENT and RIO with then shots with a Beretta 391 AUTO

Then we completely gun the gun.  Then heated the barrel with a hair dryer.  Then ran 5 swabs of Gun juice then more testing:
 

 
As you can see quite a change in speed.  Now the testing really begins.  Lets try the Zoli-Z Gun Over and Under 12GA.  We used the load that I shoot most of the time in sporting clays.  We used Kent 12GA 1 oz 1200 fps.
 

 
As you can see from our tests.  A gain in speed and more constancy.
 
The next testing was with UltraBlue.  We pushed both guns to the limit (which I don’t recommend doing).  With the Beretta Auto Loader we ran 1678 shells through the gun with no cleaning until we had a jam.
 
With the Over and Under Zoli-ZGun we shot 1800 rounds with the gun without cleaning or taking the chokes out.  The chokes screwed out fine, this is unheard of.  Again I don’t recommend doing this but we did for testing purposes only.
 
We also did some pattern testing.  We found that there was a 4% to 8% better patterns with the gun juice.