Rossi Model 92's primary extraction?

[Naphtali]

I recently bought a Rossi reproduction of the Winchester Model 92 lever action rifle, this 454 Casull being made in 2004. Futzing with it I noticed that when I ease the lever down to take its locking lugs from battery, the breech bolt jumps toward the rear. When I ease the locking lugs into battery, the bolt moves foward to lock the breech bolt in battery.

When I observe this fore-and-aft movement in bolt actions, it is primary extraction and camming the bolt locked. But I have been informed over the decades that traditional lever actions do not have primary extraction. I know my Marlin 1895 does not have this movement.

Is the movement, seemingly caused by relationship of locking lugs and their lug seats on the breech bolt, primary extraction? If it is not, why does breech bolt spring backwards and appear to be cammed forward?

[Artful]

Look at the cut in the bolt and lug race way - slight angle cut
http://www.realguns.com/images/lockingsystem1886.gif

[fecmech]

I think it is probably cause by your ejector spring which is under compression with the bolt closed. Put an empty case in the gun and the bolt jump will disappear.

[Texas by God]

My wife's .357 Rossi drops unfired rounds out of the extractor when you unload it. When you fire it it functions perfectly. So we leave it loaded. Rossis are crazy sometimes.