Easy Open is a nickname for the improved original style contender, not the G2. Their serial numbers begin at 195000, and go from there until their discontinuation in favor of the g2. The Easy Opens have slight modifications that, of course, make them easier to open, and a little more stout, compared to the original contenders. They can be identified in pictures by the knob on top of the hammer, rather than the push bar safety through the hammer. Regardless, only mid pressure cartridges like the 30 30, 45/70, etc and lower are appropriate. The Encore, on the other hand, is very stout, and can handle very powerful magnum cartridges.