Banty R
About 1/2 way down the page in the FAQs is a pic of the diffrent type extractors and an ejector , this will show you which you have , as far as popping open it sounds like you are not getting a good latch engaugement , take a candle and smoke the latch on the barrel , close the action a time or two then look at the latch to see how much area is wiped clean .
It should be even across the latch shelf and at least 1/8" up on the shelf .
stimpy