Install a sector gear clip in your gearbox. It will hold back the tappet plate and nozzle for just a bit longer giving the mag a little more time to feed the BB's up into the gun. They work magic in high ROF setups and it is easier to install one SGC in your gearbox than going through all of your mags, if you have as many as I do (13 for my primary weapon)
Personally a prefer the
King Arms version. But this is the old version and they did put out a
version 2 some time back. Otherwise the
Big Out version has served me well. Army Code have also released one, but I have not had one of these in any of my guns.