Thanks Birddog, I went into the other forums and found some information. It looks like you really need to do a good job breaking in the gun. It appears if you want the SBE II to cycle light loads, you need to run several heavy 3" mag loads thru it prior to shooting any lights. As to how many, some of the posts report as many as 200. That seems to be somewhat excessive, but I guess if you want it to perform perfectly then this is what you got to do.
Any additional information would be appreciated.