The plot grows bigger and bigger. If this was a plot to frame Oswald, why hide the rifle at all? Why not just drop it by the window in plain sight? Why stage a fake discovery of the rifle hidden under some boxes etc? Like the 'bus rider" to nowhere that seems completely pointless and even counterproductive as part of a conspiracy plan. Presumably they want the rifle found and the sooner the better but they engage in this charade. Amazing.
It's very clear that this case is waaaaaaay beyond your limited ability to comprehend and understand.
There was two plays being played out....Lee was playing the role that he'd played at Walker's. He was involved in making it appear that he had shot at JFK but missed and was fleeing to Cuba seeking asylum.
The rifle was hidden to allow him time to get out of the country. He thought that the cops wouldn't get too excited about someone shooting at JFK ( He knew that JFK was not liked by many at the DPD) and probably wouldn't find the rifle for days. THAT'S the reason the rifle was hidden....
Lee didn't know that he'd been double crossed and set up as the patsy by the killers. There were no shots fired from the TSBD that day.... I know that you think the shells and the rifle constitute proof that Lee Oswald shot and killed JFK from that sixth floor window, but if you extract your head you'd realize that the spent shells and rifle were nothing but stage props.
P.S. If you could extract your head and see that Lee Oswald was in the 1st floor lunchroom at 12:27 when Jarman and Norman walked by the room then
MAYBE you'd start to see the light.