Way back on p. 2, Dick mentions that he reassessed his method by noting the position of the toplever when "eased" vs. the position when snapped. I'd bet those of us who have done the same have noticed that the lever is further to the right when eased. As the boltbone is connected to the cambone is connected to the spindlebone etc., that can only mean that the bolt isn't seated as deep in the lug. With a protruding Greener xbolt, you can directly observe the difference in seating. In a later post, mention in made of "pushing" the lever to final position. That adds another ingredient to the procedural soup. The one gun I have seen which absolutely required the manual assist after being "snapped" was a Stoeger Condor 20 ga. used frequently for skeet in my presence. I don't think anyone will argue that the escopeta from Ipanima is anything but a utility grade gun. Lot of fit/frictional interference there somewhere and it shows. Maybe some very slick examples of better heritage and execution will "ease" just as deep as they'll "snap". I think if you have to push the lever left, closing the gun with the lever may be creating more frictional wear than simply closing the gun [completely] with the "snap" ensuring that the bolt goes home unimpeded. Big difference between inserting a wedge and driving a wedge; the difference could be frictional wear and tear.
jack